Spin transfer torque in the presence of Andreev reflections

Shuai Wang; Ling Tang; Ke Xia

doi:10.1103/PhysRevB.81.094404

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Spin transfer torque in the presence of Andreev reflections

Shuai Wang, Ling Tang, Ke Xia

DOI 10.1103/PhysRevB.81.094404 · Physical Review B

T1

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Abstract

A first-principles method is developed to study the spin transfer torques in magnetic noncollinear textured ferromagnet-superconductor heterostructure. We apply the method to study the long-range spin-triplet pairing (Sz=±1) induced by the spin-flip scattering near the ferromagnet-superconductor interface. The long-range spin-triplet Andreev reflection will saturate to the same value as usual Andreev reflection with strong enough spin-flip scattering. We find that the giant magnetoresistance effect of a spin valve with a superconductor contact can be restored by a small amount of interfacial spin-flip scattering.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Fe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown