Local probing of arrested kinetics in Gd5Ge4

Moore, J. D. ; Perkins, G. K. ; Morrison, K. ; Ghivelder, L. ; Chattopadhyay, M. K. ; Roy, S. B. ; Chaddah, P. ; Gschneidner Jr., K. A. ; Pecharsky, V. K. ; Cohen, L. F. (2008) Local probing of arrested kinetics in Gd5Ge4 Journal of Physics: Condensed Matter, 20 (46). No pp. given. ISSN 0953-8984

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Official URL: http://iopscience.iop.org/0953-8984/20/46/465212

Related URL: http://dx.doi.org/10.1088/0953-8984/20/46/465212

Abstract

We present spatially localized magnetic relaxation measurements of the first-order magnetostructural transition in Gd5Ge4 using a scanning Hall probe imaging technique. Relaxation measurements were performed at 6, 10 and 35 K to probe the field-increasing antiferromagnetic (AFM) to ferromagnetic (FM) transition and, when it can occur, the field-decreasing FM to AFM transition. We demonstrate that localized regions relax with time towards the ground state for a given field and temperature and observe different magnetic behaviours at the three measurement temperatures. In particular, the observed magnetic relaxation at 6 K is consistent with the idea of an arrested state at this temperature. Our scanning Hall probe imaging data give an insight into the phase nucleation and growth process of the martensitic-like magnetostructural first-order transition in Gd5Ge4.

Item Type:Article
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ID Code:84461
Deposited On:27 Feb 2012 13:12
Last Modified:27 Feb 2012 13:12

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