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Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite

Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite

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SRIVASTAVA, Anand, L. A. B. Olde OLTHOF, Angelo DI BERNARDO, Sachio KOMORI, Mario AMADO, Carla PALOMARES-GARCIA, Mohammad ALIDOUST, Klaus HALTERMAN, Mark Giffard BLAMIRE, Jason W. A. ROBINSON, 2017. Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite. In: Physical Review Applied. 8(4), 044008. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.8.044008

@article{Srivastava2017-06-01T15:02:52ZMagne-46828, title={Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite}, year={2017}, doi={10.1103/PhysRevApplied.8.044008}, number={4}, volume={8}, journal={Physical Review Applied}, author={Srivastava, Anand and Olthof, L. A. B. Olde and Di Bernardo, Angelo and Komori, Sachio and Amado, Mario and Palomares-Garcia, Carla and Alidoust, Mohammad and Halterman, Klaus and Blamire, Mark Giffard and Robinson, Jason W. A.}, note={Article Number: 044008} }

Palomares-Garcia, Carla eng Blamire, Mark Giffard 2019-09-12T08:53:19Z Di Bernardo, Angelo Komori, Sachio 2017-06-01T15:02:52Z Di Bernardo, Angelo Robinson, Jason W. A. Amado, Mario Palomares-Garcia, Carla The pairing state and critical temperature (T<sub>c</sub>) of a thin s-wave superconductor (S) on two or more ferromagnets (F) are controllable through the magnetization-alignment of the F layers. Magnetization misalignment can lead to spin-polarized triplet pair creation, and since such triplets are compatible with spin-polarized materials they are able to pass deeply into the F layers and so, cause a decrease in T<sub>c</sub>. Various experiments on S/F<sub>1</sub>/F<sub>2</sub> "triplet spin-valves" have been performed with the most pronounced suppression of T<sub>c</sub> reported in devices containing the half-metal ferromagnet (HMF) CrO<sub>2</sub> (F<sub>2</sub>) albeit using out-of-plane magnetic fields to tune magnetic non-collinearity [Singh et al., Phys. Rev. X 5, 021019 (2015)]. Routine transfer of spin-polarized triplets to HMFs is a major goal for superconducting spintronics so as to maximize triplet-state spin-polarization. However, CrO<sub>2</sub> is chemically unstable and out-of-plane fields are undesirable for superconductivity. Here, we demonstrate magnetization-tuneable pair conversion and transfer of spin-polarized triplet pairs to the chemically stable mixed valence manganite La<sub>2/3</sub>Ca<sub>1/3</sub>MnO<sub>3</sub> in a pseudo spin-valve device using in-plane magnetic fields. The results match microscopic theory and offer full control over the pairing state. Srivastava, Anand Olthof, L. A. B. Olde Amado, Mario Blamire, Mark Giffard Magnetization Control and Transfer of Spin-Polarized Cooper Pairs into a Half-Metal Manganite Alidoust, Mohammad Alidoust, Mohammad 2019-09-12T08:53:19Z Komori, Sachio Robinson, Jason W. A. Srivastava, Anand Olthof, L. A. B. Olde Halterman, Klaus Halterman, Klaus

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