Publications (2)6.01 Total impact
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Article: Inverse giant magnetoresistance in CoFe/Tb multilayer with perpendicular magnetic anisotropy
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ABSTRACT: We detected inverse giant magnetoresistance (GMR) in a multilayer of Ta (4 nm)/[Tb (1.6 nm)/CoFe (1.2 nm)] 5 /Cu (3 nm)/[CoFe (1.2 nm)/Tb (0.6 nm)] 5 /Ta (4 nm); both the bottom [Tb (1.6 nm)/CoFe (1.2 nm)] 5 and top [CoFe (1.2 nm)/Tb (0.6 nm)] 5 layers revealed a perpendicular magnetic anisotropy. Furthermore, depending on the Tb layer thickness, we confirmed the magnetization of the bottom CoFe layer to be either parallel or antiparallel to the applied field. Hence, the GMR behavior could be controlled by tuning the perpendicular magnetic anisotropy, i.e., it was switchable from inverse to normal GMR or from normal to inverse. Changes in GMR occurred at a compensation composition of CoFe and Tb for which no magnetization was observed due to antiferromagnetic cancellation of the Tb and CoFe moments.Journal of Applied Physics 05/2011; · 2.17 Impact Factor -
Article: Giant reversible anisotropic magnetocaloric effect in an antiferromagnetic EuFe2As2 single crystal
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ABSTRACT: Here, we report the characterization of a giant reversible anisotropic magnetocaloric effect in a EuFe <sub>2</sub> As <sub>2</sub> single crystal. The magnetic properties of EuFe <sub>2</sub> As <sub>2</sub> single crystals are quite interesting; they display a small magnetic hysteresis, anisotropy, and a first-order magnetic phase transition. The maximum magnetic entropy change in in-plane magnetic-field direction was 14.6 J/kg K around 20 K and out-of-plane was 10.3 J/kg K around 20 K as a result of changing the magnetic field from 0 to 5 T. These results suggest the possibility of using EuFe <sub>2</sub> As <sub>2</sub> single crystals in magnetic refrigeration applications.Applied Physics Letters 05/2011; · 3.84 Impact Factor
