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Pressure Dependence of Magnetoresistance for Fe/Cr Multilayers.
- Source :
- IEEE Transactions on Magnetics; May2006, Vol. 42 Issue 5, p1499-1502, 4p, 5 Graphs
- Publication Year :
- 2006
-
Abstract
- The magnetoresistance (MR) in Fe/Cr magnetic multilayers (MML) has been measured under high pressure up to 2.5 GPa. It is found that the spin-dependent scattering plays an important role in the pressure dependence of MR ratio. In the present work, for [Fe(20 Å)/Cr(10 Å)]<subscript>20</subscript> MML with antiferromagnetic (AF) state, the pressure coefficient of saturation field H<subscript>s</subscript> is (1/H<subscript>s</subscript>)(∂H<subscript>s</subscript>/∂P) = 3.3 × 10<superscript>-2</superscript> GPa<superscript>-1</superscript> between 0.1 and 2.5 GPa. We found that the (1/∣J∣)(∂∣J∣/∂P) for AF-Fe/Cr MML with polycrystalline structure is opposite in sign to that with epitaxial one. For [Fe(20 Å)/Cr(22 Å)]<subscript>20</subscript> MML with ferromagnetic (F) state, anisotropic magnetoresistance (AMR) decreases with increasing pressure. It is suggested that the anisotropy constant decreases with weakening spin-orbit interaction at high pressure. At high field, the AMR is easily suppressed by applying pressure while the giant magnetoresistance around H<subscript>s</subscript> increases slightly with increasing pressure for polycrystalline Fe/Cr MML. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 42
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 20902599
- Full Text :
- https://doi.org/10.1109/TMAG.2006.871544