Enhancement of positive magnetoresistance following a magnetic-field-induced ferromagnetic transition in the intermetallic compound Tb5Si3

Narayana Jammalamadaka, S. ; Mohapatra, Niharika ; Das, Sitikantha D. ; Sampathkumaran, E. V. (2009) Enhancement of positive magnetoresistance following a magnetic-field-induced ferromagnetic transition in the intermetallic compound Tb5Si3 Physical Review B: Condensed Matter and Materials Physics, 79 (6). 060403_1-060403_4. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v79/i6/e060403

Related URL: http://dx.doi.org/10.1103/PhysRevB.79.060403

Abstract

We report the existence of a field-induced ferromagnetic transition in the magnetically ordered state ( < 69 K) of an intermetallic compound, Tb5Si3, and this transition is distinctly first order at 1.8 K (near 60 kOe), whereas it appears to become second order near 20 K. The finding we stress is that the electrical resistivity becomes suddenly large in the high-field state after this transition, and this is observed in the entire temperature range in the magnetically ordered state. Such an enhancement of 'positive' magnetoresistance (below 100 kOe) at the metamagnetic transition field is unexpected on the basis that the application of magnetic field should favor a low-resistive state due to alignment of spins.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:45741
Deposited On:29 Jun 2011 03:33
Last Modified:29 Jun 2011 03:33

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