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Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 50: Spincaloric Transport (jointly with TT)

MA 50.7: Talk

Thursday, March 23, 2017, 11:15–11:30, HSZ 403

Thermally Induced Spin Transfer Torque on MgO-based magnetic tunnel junctions using microresonators — •Hamza Cansever1,2, Ciaran Fowley1, Rysard Narkovicz1, Ewa Kowalska1,2, Yuriy Aleksandrov2, Oguz Yildirim1, Aleksandra Titova1,2, Kilian Lenz1, Jürgen Lindner1, Jürgen Fassbende1, and Alina M. Deac11Helmholtz Zentrum Dresden Rossendorf Institute of Ion Beam Physics and Materials Research — 2TU Dresden Institute of Solid State Physics

Magnetic tunnel junctions have been commonly used in spintronics applications, such as magnetic random access memory (M-RAM), spin transfer torque RAM (STT-RAM) and hard disc drive (HDD) because of high storage capacity. A spin polarized current flowing through a ferromagnetic layer can exert spin-transfer-torque (STT) on the local magnetization. When we apply thermal gradient across the junction we can induce what is called thermal spin transfer torque (T-STT). In this study, the microresonator FMR technique is used in order to analyze how the ferromagnetic resonance signal corresponding to the free layer of an in-plane MgO-based tunnel junction device is modified in the presence of a temperature gradients across the barrier. Details of resonator fabrication and preliminary measurements are presented. This work is supported by DFG-SPP1538.

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