Motin Seikh, Md. ; Sudheendra, L. ; Rao, C. N. R. (2004) Effect of cation size and size-disorder on the magnetic and electron transport properties of La0.7−xLnxSr0.3MnO3 (Ln=Gd and Dy) Solid State Sciences, 6 (6). pp. 561-564. ISSN 1293-2558
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S12932...
Related URL: http://dx.doi.org/10.1016/j.solidstatesciences.2004.03.004
Abstract
Magnetic and electron transport properties of La0.7−xLnxSr0.3MnO3 with Ln=Gd and Dy have been investigated over a wide range of compositions to explore the effects of the radius of the A-site cation, <rA>, and the size-disorder as measured by σ2. These manganates exhibit ferromagnetism and insulator-metal transitions up to a critical value of x (xc), with the Tc(TIM) values decreasing with <rA>. When x≥xc, however, the manganates cease to be ferromagnetic and instead they show an abrupt decrease in magnetization and increase in resistivity, suggesting the likely occurrence of electronic phase separation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Manganates; Size-disorder; Insulator-metal Transition; Phase Separation |
| ID Code: | 42301 |
| Deposited On: | 02 Jun 2011 10:05 |
| Last Modified: | 02 Jun 2011 10:05 |
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