Yusuf, S. M. ; Ganguly, R. ; Chakraborty, K. R. ; Mishra, P. K. ; Paranjpe, S. K. ; Yakhmi, J. V. ; Sahni, V. C. (2001) Effect of Dy substitution for La in La0.7Ca0.3MnO3 perovskite Journal of Alloys and Compounds, 326 (1-2). pp. 89-93. ISSN 0925-8388
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/S0925-8388(01)01218-X
Abstract
AC susceptibility, resistivity and dc magnetization measurements on the (La0.757Dy0.243)0.7Ca0.3MnO3 perovskite reveal a clear departure from the well-behaved (collinear) ferromagnetic nature observed in the parent material La0.7Ca0.3MnO3 at low temperatures. Neutron diffraction structural study shows that the buckling of the MnO6 octahedra increases with the Dy substitution. This in turn gives a weaker double exchange (ferromagnetic) interaction, as the transfer integral, to, describing the hopping of eg electrons between Mn3+ and Mn4+ decreases resulting in the observed deterioration of ferromagnetism and metallic conduction.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Colossal Magnetic Materials; Manganite Perovskites |
| ID Code: | 112390 |
| Deposited On: | 01 Dec 2017 12:05 |
| Last Modified: | 01 Dec 2017 12:05 |
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