Field and sample history dependence of the compensation temperature in Sm0.97Gd0.03Al2

Vaidya, U. V. ; Rakhecha, V. C. ; Sumithra, S. ; Ramakrishnan, S. ; Grover, A. K. (2007) Field and sample history dependence of the compensation temperature in Sm0.97Gd0.03Al2 Journal of Magnetism and Magnetic Materials, 310 (2). pp. 1761-1763. ISSN 0304-8853

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03048...

Related URL: http://dx.doi.org/10.1016/j.jmmm.2006.10.586

Abstract

We present magnetization data on three polycrystalline specimens of Sm0.97Gd0.03Al2: (1) as-cast (grainy texture), (2) powder, and (3) re-melted fast-quenched (plate). The data are presented for nominally zero- (ZFC) and high-field-cooling (HFC) histories. A zero cross-over in magnetization curve at some temperature T=T0 was seen in ZFC data on grainy and powder samples, but not in the plate sample. At fields surpassing magnetocrystalline anisotropy, a 4f magnetic moment flip was still evidenced by HFC data in all samples at a compensation temperature Tcomp, which must necessarily be treated as distinct from T0 (T0 may not even exist). Proper understanding of Tcomp should take account of thermomagnetic history effects.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Sm1-xGdxAl2; Zero-magnetization; Compensation Temperature; History Effects
ID Code:14463
Deposited On:12 Nov 2010 14:14
Last Modified:02 Jun 2011 05:01

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