Anomalous magnetoresistance behavior of R2Ni3Si5 (R=Pr, Dy, Ho)

Mazumdar, Chandan ; Nigam, A. K. ; Nagarajan, R. ; Gupta, L. C. ; Godart, C. ; Padalia, B. D. ; Chandra, G. ; Vijayaraghavan, R. (1996) Anomalous magnetoresistance behavior of R2Ni3Si5 (R=Pr, Dy, Ho) Physical Review B, 54 (9). pp. 6069-6072. ISSN 0163-1829

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Magnetoresistance (MR) measurements on the antiferromagnetically ordered polycrystalline R2Ni3Si5 (R=Pr, Dy, Ho; TN=8.5 K, 9.5 K, 6.0 K, respectively) materials are reported here. Field dependence of MR, measured both below and above their respective ordering temperatures and up to a field of 45 kOe, is found to be anomalous. In all the three cases, in the magnetically ordered state, MR is not monotonic but exhibits a maximum and a minimum. A considerable contribution to MR, with nearly linear field dependence and persisting even above the magnetic ordering temperature, is observed, which is unusual. Temperature dependence of MR (in a constant high field) above the magnetic ordering temperature, measured up to 100 K, exhibits a pronounced hump. The behavior of magnetoresistance at low temperatures is interpreted in terms of metamagnetism along with a short range ferromagnetic interaction.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:11319
Deposited On:09 Nov 2010 03:34
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