TY - JOUR
T1 - Effect of pressure on the spin-dependence of electrical resistivity in Fe/Cr magnetic multilayers
AU - Oomi, Gendo
AU - Suenaga, Kazufumi
AU - Higashihara, Shuhei
AU - Saito, Kesami
AU - Mitani, Seiji
AU - Takanashi, Koki
PY - 2010/5/1
Y1 - 2010/5/1
N2 - The electrical resistivities of Fe/Cr magnetic multilayers have been measured at a high pressure and magnetic field. The electrical resistivity shows a large decrease by applying a magnetic field, indicating giant magnetoresistance (GMR). GMR decreases but the saturation field increases with increasing pressure. The spin-dependence of electrical resistivities due to the scattering of conduction electrons with spins parallel (ρ+) and antiparallel (ρ-) to the Fe layer magnetization are extracted. The pressure dependence of ρ+ is greater than that of ρ-. The origins of the pressure dependence of ρ+ and ρ- are discussed on the basis of theoretical model, and the large pressure coefficients for ρ+ and ρ- are suggested to be mainly due to a change in the random exchange potential at interfaces. A small minimum in the temperature-dependence of resistivity is induced by applying pressure. ρ+ decreases but ρ- increases with increasing temperature up to 40 K. The anomalous temperature-dependence of resistivities is discussed in connection with a Kondo-like effect.
AB - The electrical resistivities of Fe/Cr magnetic multilayers have been measured at a high pressure and magnetic field. The electrical resistivity shows a large decrease by applying a magnetic field, indicating giant magnetoresistance (GMR). GMR decreases but the saturation field increases with increasing pressure. The spin-dependence of electrical resistivities due to the scattering of conduction electrons with spins parallel (ρ+) and antiparallel (ρ-) to the Fe layer magnetization are extracted. The pressure dependence of ρ+ is greater than that of ρ-. The origins of the pressure dependence of ρ+ and ρ- are discussed on the basis of theoretical model, and the large pressure coefficients for ρ+ and ρ- are suggested to be mainly due to a change in the random exchange potential at interfaces. A small minimum in the temperature-dependence of resistivity is induced by applying pressure. ρ+ decreases but ρ- increases with increasing temperature up to 40 K. The anomalous temperature-dependence of resistivities is discussed in connection with a Kondo-like effect.
KW - Fe/Cr magnetic multilayer
KW - Giant magnetoresistance
KW - High pressure
KW - Kondo effect
KW - Spin dependent scattering
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U2 - 10.1143/JPSJ.79.054711
DO - 10.1143/JPSJ.79.054711
M3 - Article
AN - SCOPUS:77953056203
VL - 79
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 5
M1 - 054711
ER -