Metastability in the ferrimagnetic-antiferromagnetic phase transition in Co substituted Mn2Sb

Kushwaha, Pallavi ; Rawat, R. ; Chaddah, P. (2007) Metastability in the ferrimagnetic-antiferromagnetic phase transition in Co substituted Mn2Sb Journal of Physics: Condensed Matter, 20 (2). 022204_1-022204_7. ISSN 0953-8984

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Official URL: http://iopscience.iop.org/0953-8984/20/2/022204

Related URL: http://dx.doi.org/10.1088/0953-8984/20/02/022204

Abstract

A detailed investigation of the first-order ferrimagnetic (FRI) to antiferromagnetic (AFM) transition in Mn1.85Co0.15Sb is carried out. These measurements demonstrate anomalous thermomagnetic irreversibility and a glass-like frozen FRI phase at low temperatures. The irreversibility arising between the supercooling and superheating spinodals is distinguished in an ingenious way from the irreversibility arising due to kinetic arrest. Field annealing measurements show a re-entrant FRI-AFM-FRI transition with increasing temperature. In this system the kinetic arrest band and supercooling band are also shown to be anticorrelated (i.e. the regions which are kinetically arrested at higher temperature have lower supercooling temperature and vice versa), which has been a universal feature of the AFM/ferromagnetic transition so far.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
ID Code:5762
Deposited On:19 Oct 2010 11:06
Last Modified:16 May 2016 16:12

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