Abstract

We present comparative analysis of superconducting properties of two types of spin valves containing Heusler alloy Co₂Cr_{1 – x}Fe_xAl_y as one of ferromagnetic layers (F1 or F2) in the F1/F2/S structures. We have used the Heusler alloy layer (i) as a weak ferromagnet in the case of the F2 layer and (ii) as a half-metal in the case of F1 layer. In the former case, large classical effect ΔT_c of the superconducting spin valve is obtained; this is facilitated by a substantial triplet contribution Δ\(T_{c}^{{{\text{trip}}}}\) to the superconducting spin valve effect. In the latter case, giant value of Δ\(T_{c}^{{{\text{trip}}}}\) reaching 0.5 K is observed.

中文翻译：

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具有铁磁Heusler合金层的结构中的超导自旋阀效应

摘要

我们对两种类型的自旋阀的超导性能进行比较分析，这些自旋阀包含Heusler合金Co ₂ Cr _{1 – x} Fe _x Al _y作为F1 / F2 / S结构中的铁磁层之一（F1或F2）。在F2层的情况下，我们将Heusler合金层（i）用作弱铁磁体，在F1层的情况下将（ii）用作半金属。在前一种情况下，可获得超导自旋阀的大经典效应ΔT _c；这由超导自旋阀效应的三重态贡献Δ \（T_ {c} ^ {{{\ text {trip}}}} \）促进。在后一种情况下，Δ \（T_ {c} ^ {{{\ text {trip}}}}} \）的巨值 达到0.5K。