Sengupta, Kausik ; Sampathkumaran, E. V. (2006) Field-induced first-order magnetic phase transition in an intermetallic compound Nd7Rh3: evidence for kinetic hindrance, phase coexistence, and percolative electrical conduction Physical Review B: Condensed Matter and Materials Physics, 73 (2). 020406_1-020406_4. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v73/i2/e020406
Related URL: http://dx.doi.org/10.1103/PhysRevB.73.020406
Abstract
The compound Nd7Rh3, crystallizing in the Th7Fe3-type hexagonal structure, was previously known to exhibit two magnetic transitions, one at 32 K and the other at 10 K (in a zero magnetic field). Here we report the existence of a field-induced first-order antiferromagnetic-to-ferromagnetic transition at 1.8 K in this compound. On the basis of the measurements of isothermal magnetization and magnetoresistance, we provide evidence for the occurrence of "kinetic hindrance", proposed in the recent literature, resulting in phase coexistence ("supercooled" ferromagnetic+antiferromagnetic) and percolative electrical conduction in this stoichiometric intermetallic compound. A point of emphasis, as inferred from ac susceptibility data, is that such a coexisting phase is different from spin glasses thereby clarifying a question raised in the field of 'phase separation'.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 45654 |
Deposited On: | 29 Jun 2011 03:31 |
Last Modified: | 18 May 2016 01:51 |
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