Niklas Roschewsky

Current heating induced spin Seebeck effect

A measurement technique for the spin Seebeck effect is presented, wherein the normal metal layer used for its detection is exploited simultaneously as a resistive heater and thermometer. We show how the various contributions to the measured total signal can be disentangled, allowing to extract the voltage signal solely caused by the spin Seebeck effect. To this end, we performed measurements as a function of the external magnetic field strength and its orientation. We find that the effect scales linearly with the induced rise in temperature, as expected for the spin Seebeck effect.

Time resolved spin Seebeck effect experiments

In this Letter, we present the results of transient thermopower experiments, performed at room temperature on yttrium iron garnet/platinum bilayers. Upon application of a time-varying thermal gradient, we observe a characteristic low-pass frequency response of the ensuing thermopower voltage with cutoff frequencies of up to 37 MHz. We interpret our results in terms of the spin Seebeck effect, and argue that small wavevector magnons are of minor importance for the spin Seebeck effect in our thin film hybrid structures.

Spin-orbit torques in ferrimagnetic GdFeCo alloys

The spin-orbit torque switching of ferrimagnetic Gd

Spin-orbit torque switching of ultralarge-thickness ferrimagnetic GdFeCo

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An all-electrical torque differential magnetometer operating under ambient conditions

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Perpendicular magnetic tunnel junction performance under mechanical strain

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Time resolved spin Seebeck eect experiments as a probe of magnon-phonon thermalization time

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Spin-Orbit Torque and Nernst Effect in Bi-Sb/Co Heterostructures.

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Thickness Dependence of Spin-Orbit Torques in Ferrimagnetic GdFeCo Alloys

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Spin-Orbit Torques in ferrimagnetic GdFeCo

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