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Sharma, Shilpam ; Prakash, Jai ; Thakur, Gohil S. ; Satya, A. T. ; Bharathi, A. ; Ganguli, A. K. ; Sundar, C. S. (2011) Superconducting and critical properties of PrOFe_0.9Co_0.1As: effect of P doping Superconductor Science and Technology, 24 (6). No pp. given. ISSN 0953-2048

Govindaraj, R. ; Sundar, C. S. (2011) Anomalous variation of electric field gradient in α-Ti Physica B: Condensed Matter, 406 (11). pp. 2245-2248. ISSN 0921-4526

Nagendran, R. ; Thirumurugan, N. ; Chinnasamy, N. ; Janawadkar, M. P. ; Sundar, C. S. (2011) Development of high field SQUID magnetometer for magnetization studies up to 7 T and temperatures in the range from 4.2 to 300 K Review of Scientific Instruments, 82 (1). 015109_1-015109_10. ISSN 0034-6748

Srihari, Velaga ; Sridharan, V. ; Chandra, Sharat ; Sastry, V. S. ; Sahu, H. K. ; Sundar, C. S. (2011) Wide band gap tunability of bulk Cd_1-xCa_xO Journal of Applied Physics, 109 (1). 013510_1-013510_7. ISSN 0021-8979

Yasodha, P. ; Premila, M. ; Bharathi, A. ; Valsakumar, M. C. ; Rajaraman, R. ; Sundar, C. S. (2010) Infrared spectroscopic study of the local structural changes across the metal insulator transition in nickel-doped GdBaCo₂O_5.5 Journal of Solid State Chemistry, 183 (11). pp. 2602-2608. ISSN 0022-4596

Nagendran, R. ; Thirumurugan, N. ; Chinnasamy, N. ; Janawadkar, M. P. ; Baskaran, R. ; Vaidhyanathan, L. S. ; Sundar, C. S. (2010) Optimum eddy current excitation frequency for subsurface defect detection in SQUID based non-destructive evaluation NDT & E International, 43 (8). pp. 713-717. ISSN 0963-8695

Ghosh, N. ; Bharathi, A. ; Satya, A. T. ; Sharma, S. ; Mani, Awadhesh ; Sarguna, R. M. ; Sornadurai, D. ; Sastry, V. S. ; Sundar, C. S. (2010) Kohler's rule in Ba_1-xK_xFe₂As₂ Solid State Communications, 150 (39-40). pp. 1940-1943. ISSN 0038-1098

Nandi, Prithwish Kumar ; Valsakumar, M. C. ; Chandra, Sharat ; Sahu, H. K. ; Sundar, C. S. (2010) Efficacy of surface error corrections to density functional theory calculations of vacancy formation energy in transition metals Journal of Physics: Condensed Matter, 22 (34). 345501_1-345501_9. ISSN 0953-8984

Sharma, Shilpam ; Bharathi, A. ; Chandra, Sharat ; Raghavendra Reddy, V. ; Paulraj, S. ; Satya, A. T. ; Sastry, V. S. ; Gupta, Ajay ; Sundar, C. S. (2010) Superconductivity in Ru substituted polycrystalline BaFe_2-xRu_xAs₂ Physical Review B: Condensed Matter and Materials Physics, 81 (17). 174512_1-174512_7. ISSN 1098-0121

Bharathi, A. ; Sharma, Shilpam ; Paulraj, S. ; Satya, A. T. ; Hariharan, Y. ; Sundar, C. S. (2010) Critical properties of superconducting Ba_1-xK_xFe₂As₂ Physica C: Superconductivity, 470 (1). pp. 8-11. ISSN 0921-4534

Thirumurugan, N. ; Bharathi, A. ; Sundar, C. S. (2010) Magnetic phase evolution in Fe substituted GdBaCo₂O_5.5 Journal of Magnetism and Magnetic Materials, 322 (1). pp. 152-157. ISSN 0304-8853

Nagendran, R. ; Thirumurugan, N. ; Chinnasamy, N. ; Janawadkar, M. P. ; Sundar, C. S. (2010) On the design and implementation of a novel impedance chamber based variable temperature regulator at liquid helium temperatures Review of Scientific Instruments, 81 (4). 045112_1-045112_7. ISSN 0034-6748

Prabakar, K. ; Jayapandian, J. ; Tyagi, A. K. ; Sundar, C. S. ; Baldev Raj, (2010) Sensitiviy of a nanocantilever-based mass sensor Nano, 5 (1). pp. 25-30. ISSN 1793-2920

Rajaraman, R. ; Amarendra, G. ; Sundar, C. S. (2009) Defect evolution in steels: insights from positron studies Physica Status Solidi C, 6 (11). pp. 2285-2290. ISSN 1610-1634

Arunkumar, J. ; Abhaya, S. ; Rajaraman, R. ; Amarendra, G. ; Nair, K. G. M. ; Sundar, C. S. ; Baldev Raj, (2009) Positron annihilation studies on D9 steel - effect of Ti concentration Physica Status Solidi C, 6 (11). pp. 2319-2321. ISSN 1610-1634

Sairam, T. N. ; Dey, P. ; Mangamma, G. ; Nath, T. K. ; Sundar, C. S. (2009) Temperature dependence of phonon modes in nanocrystalline La_0.67Ca_0.33MnO₃ as observed by infrared spectroscopy Journal of Nanoscience and Nanotechnology, 9 (9). pp. 5471-5475. ISSN 1533-4880

Govindaraj, R. ; Sundar, C. S. ; Arora, A. K. (2009) Studies of local structure at Zr sites in pressure amorphized zirconium tungstate Journal of Physics: Condensed Matter, 21 (23). 235402_1-235402_6. ISSN 0953-8984

Srihari, V. ; Sridharan, V. ; Sahu, H. K. ; Raghavan, G. ; Sastry, V. S. ; Sundar, C. S. (2009) Combustion synthesis of Ga₂O₃ nanoparticles Journal of Materials Science, 44 (2). pp. 671-675. ISSN 0022-2461

Bharathi, A. ; Yasodha, P. ; Gayathri, N. ; Satya, A. T. ; Nagendran, R. ; Thirumurugan, N. ; Sundar, C. S. ; Hariharan , Y. (2008) Magnetic and transport behavior of Ni-substituted GdBaCo₂O_5+δ perovskite Physical Review B: Condensed Matter and Materials Physics, 77 (8). 085113 _1-085113_8. ISSN 1098-0121

Govindaraj, R. ; Sundar, C. S. ; Arora , A. K. (2007) Atomic scale study of negative thermal expansion in zirconium tungstate Physical Review B: Condensed Matter and Materials Physics, 76 (1). 012104_1-012104 _4. ISSN 1098-0121

Abhaya, S. ; Amarendra, G. ; Kalavathi, S. ; Gopalan, Padma ; Kamruddin, M. ; Tyagi, A. K. ; Sastry, V. S. ; Sundar, C. S. (2007) Silicidation in Ni/Si thin film system investigated by X-ray diffraction and Auger electron spectroscopy Applied Surface Science, 253 (8). pp. 3799-3802. ISSN 0169-4332

Govindaraj, R. ; Sundar, C. S. (2006) Competing magnetic phases in La_0.7Sr_0.3MnO₃ as deduced from Mn site hyperfine parameters Journal of Physics: Condensed Matter, 18 (32). pp. 7651-7658. ISSN 0953-8984

Govindaraj, R. ; Sundar, C. S. (2006) Implications of Mn site hyperfine fields on CMR properties of manganites as studied by perturbed angular correlation spectroscopy Physica Scripta, 74 (2). pp. 247-250. ISSN 0031-8949

Gayathri, N. ; Bharathi, A. ; Sastry, V. S. ; Sundar, C. S. ; Hariharan, Y. (2006) Ground state changes induced by Ni substitution in Na_xCoO₂ Solid State Communications, 138 (10-11). pp. 489-493. ISSN 0038-1098

Sivasubramanian, V. ; Arora, A. K. ; Premila, M. ; Sundar, C. S. ; Sastry, V. S. (2006) Optical properties of CdS nanoparticles upon annealing Physica E: Low-dimensional Systems and Nanostructures, 31 (1). pp. 93-98. ISSN 1386-9477

Govindaraj, R. ; Sundar, C. S. ; Kesavamoorthy, R. (2006) Atomic scale study of oxidation of hafnium: formation of hafnium core and oxide shell Journal of Applied Physics, 100 (8). 084318_1-084318_5. ISSN 0021-8979

Gopalan, P. ; Rajaraman, R. ; Amarendra, G. ; Sundar, C. S. ; Viswanathan, B. ; Jayakumar, T. ; Palanichamy, P. ; Raj, B. (2005) Characterisation of β-quenched and thermally aged Zircaloy-2 by positron annihilation, hardness and ultrasonic velocity measurements Journal of Nuclear Materials, 345 (2-3). pp. 162-166. ISSN 0022-3115

Sakuntala, T. ; Bharathi, A. ; Deb, S. K. ; Gayathri, N. ; Sundar, C. S. ; Hariharan, Y. (2005) Raman scattering investigation of electron-phonon coupling in carbon substituted MgB₂ Journal of Physics: Condensed Matter, 17 (21). pp. 3285-3292. ISSN 0953-8984

Govindaraj, R. ; Sundar, C. S. (2004) Linear relationship between magnetic hyperfine field and electric-field gradient at Mn sites in lanthanum strontium manganite Physical Review B: Condensed Matter and Materials Physics, 70 (22). 220405_1-220405_4. ISSN 1098-0121

Govindaraj, R. ; Sundar, C. S. ; Seetha Lakshmi, L. ; Sridharan, V. ; Premila, M. ; Natarajan, D. V. (2004) Perturbed-angular-correlation studies in hafnium doped La_0.67Ca_0.33MnO₃ Chemical Physics, 302 (1-3). pp. 185-192. ISSN 0301-0104

Vasanthi, R. ; RuthMangani, I. ; Manoravi, P. ; Joseph, M. ; Kesavamoorthy, R. ; Sundar, C. S. ; Selladurai, S. (2004) Comparison of bulk and pulsed laser deposited thin film of LiCo_0.85Cr_0.15O₂ for lithium battery application Scripta Materialia, 50 (10). pp. 1329-1333. ISSN 1359-6462

Bharathi, A. ; Hariharan, Y. ; Balaselvi, Jemima ; Sundar, C. S. (2003) Superconductivity in MgB₂: phonon modes and influence of carbon doping Sadhana (Academy Proceedings in Engineering Sciences), 28 (1-2). pp. 263-272. ISSN 0256-2499

Bharathi, A. ; Jemima Balaselvi, S. ; Premila, M. ; Sairam, T. N. ; Reddy, G. L. N. ; Sundar, C. S. ; Hariharan, Y. (2002) Synthesis and search for superconductivity in LiBC Solid State Communications, 124 (10-11). pp. 423-428. ISSN 0038-1098

Mani, Awadhesh ; Bharathi, A. ; Mathi Jaya, S. ; Reddy, G. L. N. ; Sundar, C. S. ; Hariharan, Y. (2002) Evolution of the Kondo insulating gap in Fe_1-xRu_xSi Physical Review B: Condensed Matter and Materials Physics, 65 (24). 245206_1-245206_12. ISSN 1098-0121

Sundar, C. S. ; Bharathi, A. ; Premila, M. ; Hariharan, Y. (2001) Metal-insulator transition in V₂O₃: positron lifetime studies Journal of Alloys and Compounds, 326 (1-2). pp. 105-107. ISSN 0925-8388

Janaki, J. ; Premila, M. ; Gopalan, Padma ; Sastry, V. S. ; Sundar, C. S. (2000) Thermal stability of a fullerene-amine adduct Thermochimica Acta, 356 (1-2). pp. 109-116. ISSN 0040-6031

Ghosh, G. ; Sengupta, S. ; Sastry, V. S. ; Sundar, C. S. ; Radhakrishnan, T. S. (2000) Sluggishness in the phase transformation in solid C₇₀ Journal of Physics and Chemistry of Solids, 61 (7). pp. 1137-1140. ISSN 0022-3697

Bharathi, A. ; Hariharan, Y. ; Sundar, C. S. (2000) Positron lifetime measurements and electronic structure of CeNiSn Physical Review B: Condensed Matter and Materials Physics, 61 (16). pp. 10677-10681. ISSN 1098-0121

Cao, H. ; Yuan, J. P. ; Zhang, R. ; Sundar, C. S. ; Jean, Y. C. ; Suzuki, R. ; Ohdaira, T. ; Nielsen, B. (1999) Free volumes and holes near the polymer surface studied by positron annihilation Applied Surface Science, 149 (1-4). pp. 116-124. ISSN 0169-4332

Ghosh, G. ; Sastry, V. S. ; Sundar, C. S. ; Sengupta, Surajit ; Radhakrishnan, T. S. (1998) Low temperature hcp to monoclinic structural transition in solid C₇₀: ephemeral nature of the intermediate phase Physical Review B: Condensed Matter and Materials Physics, 58 (21). pp. 14094-14097. ISSN 1098-0121

Ghosh, G. ; Sastry, V. S. ; Sundar, C. S. ; Sengupta, Surajit ; Radhakrishnan, T. S. (1998) Low-temperature hcp-to-monoclinic structural transition in solid C₇₀: ephemeral nature of the intermediate phase Physical Review B: Condensed Matter and Materials Physics, 58 (21). pp. 14094-14097. ISSN 1098-0121

Sridharan, V. ; Devadhasan, K. V. ; Natarajan, D. V. ; Sundar, C. S. ; Janaki, J. ; Sastrya, V. S. ; Hariharan, Y. ; Radhakrishnan, T. S. (1998) Possible intermediate phase in the orientational ordering in solid C₆₀ - a quasi adiabatic calorimetric study Solid State Communications, 108 (6). pp. 393-398. ISSN 0038-1098

Cao, H. ; Zhang, Renwu ; Sundar, C. S. ; Yuan, Jen-Pwu ; He, Y. ; Sandreczki, T. C. ; Jean, Y. C. ; Nielsen, B. (1998) Degradation of polymer coating systems studied by positron annihilation spectroscopy. 1. UV irradiation effect Macromolecules, 31 (19). pp. 6627-6635. ISSN 0024-9297

Ghosh, G. ; Sastry, V. S. ; Sundar, C. S. ; Radhakrishnan, T. S. (1998) Structural transformation in HCP solid C₇₀ at low temperatures Solid State Communications, 105 (4). pp. 247-251. ISSN 0038-1098

Adelene Nisha, J. ; Premila, M. ; Sridharan, V. ; Sundar, C. S. ; Radhakrishnan, T. S. (1998) UV-irradiation studies on C₇₀ clusters in mixed solvents Carbon, 36 (5-6). pp. 637-639. ISSN 0008-6223

Bharathi, A. ; Mani, Awadhesh ; Narasimha Rao, G. V. ; Sundar, C. S. ; Hariharan, Y. (1997) Resistivity studies in the Kondo insulating system, FeSi_1-xGe_x Physica B: Condensed Matter, 240 (1-2). pp. 1-7. ISSN 0921-4526

Bharathi, A. ; Hariharan, Y. ; Mani, Awadhesh ; Sundar, C. S. (1997) Positron-lifetime studies in the Kondo insulator FeSi Physical Review B: Condensed Matter and Materials Physics, 55 (20). R13385-R13388. ISSN 1098-0121

Sundar, C. S. ; Hariharan, Y. ; Bharathi, A. ; Premila, M. ; Sastry, V. S. ; Rao, G. V. N. ; Janaki, J. ; Natarajan, D. V. ; Devadhasan, K. V. ; Radhakrishnan, T. S. ; Subramanian, N. ; Sahu, P. Ch. ; Yousuf, M. ; Raju, S. ; Raghunathan, V. S. ; Valsakumar, M. C. (1997) Structural studies on fullerenes Progress in Crystal Growth and Characterization of Materials, 34 (1-4). pp. 11-23. ISSN 0960-8974

Rajaraman, R. ; Amarendra, G. ; Viswanathan, B. ; Sundar, C. S. ; Gopinathan, K. P. (1996) Suppression of helium bubble growth in palladium by prior cold working Journal of Nuclear Materials, 231 (1-2). pp. 55-62. ISSN 0022-3115

Bharathi, A. ; Sundar, C. S. ; Hariharan, Y. ; Radhakrishnan, T. S. ; Hossain, Z. ; Nagarajan, R. ; Gupta, L. C. ; Vijayaraghavan, R. (1996) Positron lifetime studies in borocarbides Physica B: Condensed Matter, 223-224 . pp. 123-125. ISSN 0921-4526

Sundar, C. S. ; Sahu, P. Ch. ; Sastry, V. S. ; Rao, G. V. N. ; Sridharan, V. ; Premila, M. ; Bharathi, A. ; Hariharan, Y. ; Radhakrishnan, T. S. ; Muthu, D. V. S. ; Sood, A. K. (1996) Pressure-induced polymerization of fullerenes: a comparative study of C₆₀ and C₇₀ Physical Review B: Condensed Matter and Materials Physics, 53 (13). pp. 8180-8183. ISSN 1098-0121

Adelene Nisha, J. ; Sridharan, V. ; Janaki, J. ; Hariharan, Y. ; Sastry, V. S. ; Sundar, C. S. ; Radhakrishnan, T. S. (1996) Studies of C₆₀ oxidation and products The Journal of Physical Chemistry, 100 (11). pp. 4503-4506. ISSN 0022-3654

Sundar, C. S. ; Bharathi, A. ; Hariharan, Y. ; Radhakrishnan, T. S. ; Hossain, Z. ; Nagarajan, R. ; Gupta, L. C. ; Vijayaraghavan, R. (1996) Positron-lifetime studies in YNi₂B₂C Physical Review B: Condensed Matter and Materials Physics, 53 (3). R2971-R2974. ISSN 1098-0121

Janaki, J. ; Rao, G. V. N. ; Sankara Sastry, V. ; Hariharan, Y. ; Radhakrishnan, T. S. ; Sundar, C. S. ; Bharati, A. ; Valsakumar, M. C. ; Subramanian, N. (1995) Low temperature X-ray diffraction study of the phases of C₇₀ Solid State Communications, 94 (1). pp. 37-40. ISSN 0038-1098

Sundar, C. S. (1994) Positron annihilation spectroscopy in materials science Bulletin of Materials Science, 17 (7). pp. 1215-1232. ISSN 0250-4707

Devadhasan, K. V. ; Natarajan, D. V. ; Janaki, J. ; Sastry, V. S. ; Hariharan, Y. ; Sundar, C. S. ; Bharathi, A. ; Valsakumar, M. C. ; Radhakrishnan, T. S. (1994) Specific heat study of C₆₀ single crystals Solid State Communications, 92 (9). pp. 715-719. ISSN 0038-1098

SenGupta, A. ; Bhatnagar, A. K. ; Gopinathan, K. P. ; Sundar, C. S. (1993) Annealing of native defects in Te-doped GaAs Solid State Communications, 88 (6). pp. 471-473. ISSN 0038-1098

Valsakumar, M. C. ; Subramanian, N. ; Yousuf, M. ; Sahu, P. Ch. ; Hariharan, Y. ; Bharathi, A. ; Sankara Sastry, V. ; Janaki, J. ; Rao, G. V. N. ; Radhakrishnan, T. S. ; Sundar, C. S. (1993) Crystal structure and disorder in solid C₇₀ Physical Review B: Condensed Matter and Materials Physics, 48 (12). pp. 9080-9085. ISSN 1098-0121

Sundar, C. S. ; Bharathi, A. ; Hariharan, Y. ; Janaki, J. ; Sankara Sastry, V. ; Radhakrishnan, T. S. (1992) Thermal decomposition of C₆₀ Solid State Communications, 84 (8). pp. 823-826. ISSN 0038-1098

Jean, Y. C. ; Lu, X. ; Lou, Y. ; Bharathi, A. ; Sundar, C. S. ; Lyu, Y. ; Hor, P. H. ; Chu, C. W. (1992) Positron annihilation in C₆₀ Physical Review B: Condensed Matter and Materials Physics, 45 (20). pp. 12126-12129. ISSN 1098-0121

Deng, Q. ; Sundar, C. S. ; Jean , Y. C. (1992) Pressure dependence of free-volume hole properties in an epoxy polymer The Journal of Physical Chemistry, 96 (1). pp. 492-495. ISSN 0022-3654

Sundar, C. S. ; Bharathi, A. ; Ching, W. Y. ; Jean, Y. C. ; Hor, P. H. ; Meng, R. L. ; Huang, Z. J. ; Chu, C. W. (1991) Positron-annihilation studies on the Bi-Sr-Ca-Cu-O superconductor Physical Review B: Condensed Matter and Materials Physics, 43 (16). pp. 13019-13024. ISSN 1098-0121

Sundar, C. S. ; Bharathi, A. ; Jean, Y. C. ; Hor, P. H. ; Meng, R. L. ; Xue, Y. Y. ; Huang, Z. J. ; Chu, C. W. (1990) Positron-annihilation studies on the YBa₂Cu₄O₈ superconductor Physical Review B: Condensed Matter and Materials Physics, 41 (16). pp. 11685-11688. ISSN 1098-0121

Jean, Y. C. ; Sundar, C. S. ; Bharathi, A. ; Kyle, J. ; Nakanishi, H. ; Tseng, P. K. ; Hor, P. H. ; Meng, R. L. ; Huang, Z. J. ; Chu, C. W. ; Wang , Z. Z. (1990) Local charge-density change and superconductivity: a positron study Physical Review Letters, 64 (13). pp. 1593-1596. ISSN 0031-9007

Howell, R. H. ; Radousky, H. B. ; Wachs, A. L. ; Fluss, M. J. ; Turchi, P. E. A. ; Jean, Y. C. ; Sundar, C. S. ; Chu, C. W. ; Peng, J. L. ; Folkerts, T. J. ; Shelton, R. N. ; Hinks, D. G. (1989) Systematics in position annihilation lifetime analysis of high T_c superconducting transitions Physica C: Superconductivity, 162-164 (2). pp. 1377-1378. ISSN 0921-4534

Sundar, C. S. ; Bharathi, A. ; Jean, Y. C. ; Hinks, D. G. ; Dabrowski, B. ; Zheng, Y. ; Mitchell, A. W. ; Ho, J. C. ; Howell, R. H. ; Wachs, A. L. ; Turchi, P. E. A. ; Fluss, M. J. ; Meng, R. L. ; Hor, P. H. ; Huang, Z. J. ; Chu, C. W. (1989) The electronic properties of high T_c superconductors probed by positron annihilation Physica C: Superconductivity, 162-164 (2). pp. 1379-1380. ISSN 0921-4534

Bharathi, A. ; Sundar, C. S. ; Hariharan, Y. (1989) A study of positron distribution and annihilation characteristics in YBa₂Cu₃O_7-x Journal of Physics: Condensed Matter, 1 (8). pp. 1467-1474. ISSN 0953-8984

Panda, B. K. ; Mahapatra, D. P. ; Padhi, H. C. ; Gopinathan, K. P. ; Sundar, C. S. ; Amarendra, G. (1988) Positron annihilation in gallium phosphide Journal of Physics C: Solid State Physics, 21 (35). pp. 6039-6046. ISSN 0022-3719

Sood, A. K. ; Sankaran, K. ; Sastry, V. S. ; Janawadkar, M. P. ; Sundar, C. S. ; Janaki, J. ; Vijayalakshmi, S. ; Hariharan, Y. (1988) Experimental study of the decomposition of Y₁Ba₂Cu₃O_7-x into tetragonal and orthorhombic phases Physica C: Superconductivity, 156 (5). pp. 720-726. ISSN 0921-4534

Sundar, C. S. ; Sood, A. K. ; Bharathi, A. ; Hariharan, Y. (1988) Positron studies across the superconducting transition in Y₁Ba₂Cu₃O_7-x Physica C: Superconductivity, 153-155 (1). pp. 155-156. ISSN 0921-4534

Bharathi, A. ; Hariharan, Y. ; Sood, A. K. ; Sankara Sastry, V. ; Janawadkar, M. P. ; Sundar, C. S. (1988) Positron studies on Y₁Ba₂Cu₃O_7-x: charged oxygen vacancies? Physica C: Superconductivity, 153-155 (1). pp. 111-112. ISSN 0921-4534

Bharathi, A. ; Hariharan, Y. ; Sood, A. K. ; Sankara Sastry, V. ; Janawadkar, M. P. ; Sundar, C. S. (1988) Positron annihilation study of oxygen vacancies in Y₁Ba₂Cu₃O_7-x EPL: Europhysics Letters, 6 (4). pp. 369-374. ISSN 0295-5075

Bharathi, A. ; Sundar, C. S. ; Vasumathi, D. ; Gopinathan, K. P. (1987) A positron annihilation study of clustering of Ag atoms in a quenched Al-1 at% Ag alloy Physica Status Solidi A, 102 (1). pp. 139-143. ISSN 0031-8965

Ramasamy, S. ; Narayanasamy, A. ; Nagarajan, T. ; Gopinathan, K. P. ; Sundar, C. S. ; Viswanathan, B. (1981) Positron annihilation studies of ordered and disordered Ni₃Fe and NiFe alloys Physica Scripta, 23 (3). pp. 297-300. ISSN 0031-8949

Gopinathan, K. P. ; Sundar, C. S. ; Viswanathan, B. ; Bharathi, A. (1980) Positron annihilation studies of rare-earth mixed valence compounds Bulletin of Materials Science, 2 (3). pp. 207-216. ISSN 0250-4707

Bharathi, A. ; Gopinathan, K. P. ; Sundar, C. S. ; Viswanathan, B. (1979) Temperature dependence of positron lifetime in GaAs crystals with defects Pramana - Journal of Physics, 13 (6). pp. 625-636. ISSN 0304-4289

Gopinathan, K. P. ; Sundar, C. S. ; Viswanathan, B. (1979) Positron annihilation studies of SmS and (Sm_0.8Gd_0.2)S across valence transitions Solid State Communications, 32 (5). pp. 369-373. ISSN 0038-1098