Sampathkumaran, E. V. ; Majumdar, Subham ; Mallik, R. ; Vijayaraghavan, R. ; Wada, H. ; Shiga, M. (2000) Unusually large negative magnetoresistance around 200 K in the alloys Gd1−xLaxMn2Ge2 Journal of Physics: Condensed Matter, 12 (25). L399-L403. ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/12/25/103
Related URL: http://dx.doi.org/10.1088/0953-8984/12/25/103
Abstract
We report here the observation of large negative magnetoresistance (MR) at 200 K (for instance, about −5.5% for the application of a magnetic field of 70 kOe) in magnetic alloys, Gd1−xLaxMn2Ge2 (x=0.07 and 0.08). There is a distinct sign reversal of MR, with a comparable magnitude, for x=0.07 at 123 K thereby establishing the presence of temperature dependent magnetic structures. The observation of a large MR at temperatures as high as 200 K is uncommon among the bulk form of alloys.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 45745 |
| Deposited On: | 29 Jun 2011 03:25 |
| Last Modified: | 29 Jun 2011 03:25 |
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