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Perpendicular magnetic anisotropy, hysteresis and structural properties of nanostructured FeCoV/Ti multilayers

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Title Perpendicular magnetic anisotropy, hysteresis and structural properties of nanostructured FeCoV/Ti multilayers
 
Creator KUMAR, MS
BONI, P
HORISBERGER, M
 
Subject films
magnetostriction
supermirrors
refinement
silver
ni
fecov/ti multilayers
perpendicular magnetic anisotropy
coercivity
remanence
grain size
 
Description FeCoV/Ti multilayers are investigated in order to study perpendicular magnetic anisotropy, variation of saturation magnetization, remanence, coercivity and structural properties. Five samples with t(Ti) = 1.04 nm and t(FeCoV) = 0.89-4.47 nm are prepared by DC magnetron sputtering. X-ray diffraction measurements carried out on the samples show a strong FeCoV(l 10) texture for larger t(FeCoV). The grain size determined from the FeCoV(l 10) peaks displays a decreasing trend with decreasing t(FeCoV) indicating that the grain size is mainly determined by the t(FeCoV). We have performed magnetic hysteresis measurements in order to investigate various magnetic properties. The interface/surface and volume anisotropy constants determined from the measurements are K-s = 0.826 mJ/m(2) and K-v = -1.84 MJ/m(3), respectively. The data analysis indicates that the samples may have their easy direction of magnetization perpendicular to the film plane for t(FeCoV) < 0.89 nm. The saturation magnetization is observed to decrease with decreasing t(FeCoV) and from a Plot Of M(s)t(FeCoV) vs. t(FeCoV) we have determined a dead layer thickness of 0.33 nm at the FeCoV interfaces. The variation of coercivity and remanence with t(FeCoV) may be due to both random anisotropy and superparamagnetism. The decrease in remanence with decreasing t(FeCoV) can also be attributed to the progressive change of the easy direction of magnetization away from the film plane. (C) 2002 .
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-26T09:13:26Z
2011-12-26T12:53:54Z
2011-12-27T05:41:03Z
2011-07-26T09:13:26Z
2011-12-26T12:53:54Z
2011-12-27T05:41:03Z
2003
 
Type Article
 
Identifier PHYSICA B-CONDENSED MATTER, 325(1-4), 401-409
0921-4526
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6861
http://hdl.handle.net/10054/6861
 
Language en