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Mossbauer studies on structural ordering and magnetic properties of melt-spun Ni-Fe-Ga ribbons

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Title Mossbauer studies on structural ordering and magnetic properties of melt-spun Ni-Fe-Ga ribbons
 
Creator RAMA RAO, NV
GOPALAN, R
MANIVEL RAJA, M
CHANDRASEKARAN, V
SURESH, KG
 
Subject shape-memory alloy
martensitic-transformation
hyperfine fields
ni2mnga
system
antisite defects
curie temperature
ferromagnetic materials
gallium alloys
hyperfine interactions
iron alloys
magnetic moments
magnetisation
melt spinning
mossbauer effect
nickel alloys
order-disorder transformations
shape memory effects
 
Description Ribbons of ferromagnetic shape memory Ni(2+x)Fe(1-x)Ga (x=0 and 0.12) alloys were prepared at wheel speeds of 12 and 35 m/s by melt spinning technique. The structural (site) disorder and the associated changes in the magnetic properties of the ribbons were investigated by (57)Fe Mossbauer spectroscopy and magnetization measurements respectively. Mossbauer spectra of Ni(2)FeGa ribbon revealed the presence of both L2(1) order and B2-like disorder with some amount of Fe antisite atoms on Ni site. The increase in Ni content was found to decrease the T(C) while its effect on T(M) was the opposite way.
 
Publisher AMER INST PHYSICS
 
Date 2011-07-16T09:34:00Z
2011-12-26T12:49:41Z
2011-12-27T05:35:17Z
2011-07-16T09:34:00Z
2011-12-26T12:49:41Z
2011-12-27T05:35:17Z
2008
 
Type Article
 
Identifier APPLIED PHYSICS LETTERS, 93(20), -
0003-6951
http://dx.doi.org/10.1063/1.3028342
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4390
http://hdl.handle.net/10054/4390
 
Language en