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A STUDY OF ANISOTROPIC MAGNETORESISTANCE IN A-FENIMNBSI ALLOYS

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Title A STUDY OF ANISOTROPIC MAGNETORESISTANCE IN A-FENIMNBSI ALLOYS
 
Creator SHARMA, N
PRASAD, S
NIGAM, AK
CHANDRA, G
SHRINGI, SN
KRISHNAN, R
 
Subject spontaneous resistivity anisotropy
electrical-resistivity
metallic glasses
ni
ferromagnetism
transition
weak
 
Description Longitudinal and transverse magnetoresistivity measurements have been performed on a-Fe40-xNi40MnxB12Si8 alloys (0 less-than-or-equal-to x less-than-or-equal-to 5.5) in fields up to 40 kG, at 4.2 K, 100 K, 200 K, and 300 K. Above technical saturation, all the alloys exhibit a negative slope, i.e. the resistivity decreases as a function of the magnetic field. The high-field magnetoresistivity slope becomes more and more negative with increasing Mn concentration. Assuming that the negative slope of magnetoresistance is caused by the suppression of spin waves, the temperature and composition dependence of magnetoresistivity of the present series could be qualitatively understood. The spin-wave contribution to the zero-field resistivity has been estimated using a simplified approach. Furthermore, the ferromagnetic anisotropy of resistivity (FAR) has been calculated and the results are analysed in the light of a two-current conduction model generalized to weak ferromagnets and amorphous alloys.
 
Publisher IOP PUBLISHING LTD
 
Date 2011-08-03T13:09:10Z
2011-12-26T12:54:13Z
2011-12-27T05:41:49Z
2011-08-03T13:09:10Z
2011-12-26T12:54:13Z
2011-12-27T05:41:49Z
1994
 
Type Article
 
Identifier JOURNAL OF PHYSICS-CONDENSED MATTER, 6(28), 5493-5506
0953-8984
http://dx.doi.org/10.1088/0953-8984/6/28/022
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9037
http://hdl.handle.net/10054/9037
 
Language en