Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 38: Spin hall effects

MA 38.7: Vortrag

Mittwoch, 3. April 2019, 18:45–19:00, H52

Transverse spin Hall magnetoresistance in Au/YIG — •Tobias Kosub1, Saül Vélez2, Juan M. Gomez-Perez2, Luis E. Hueso2,3, Jürgen Fassbender1, Fèlix Casanova2,3, and Denys Makarov11Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Dresden, Germany — 2CIC nanoGUNE, Donostia-San Sebastian, Spain — 3IKERBASQUE, Basque Foundation for Science, Bilbao, Spain

Magnetic insulators and nonmagnetic metals are both large classes of materials, but their combined application for insulator spintronics hinges on peculiar interface effects, such as spin Hall magnetoresistance (SMR). This effect is usually exploited for metals like Pt or Ta [1], which offer good chemical properties and large spin Hall angles.

However, many more metals can be employed in SMR applications when longitudinal and transverse resistances are properly separated [2] to routinely access smaller magnetoresistance effects.

We demonstrate this approach through a thorough study [3] of a Au thin film on the magnetic insulator Y3Fe5O12 revealing both longitudinal and transverse magnetotransport signatures of the spin Hall magnetoresistance. An anomalous Hall effect due to proximity magnetization is not evident. We calculate spintronic quantities like spin mixing conductivities based only on static magnetotransport results using a meta-analysis.

[1] T. Kosub et al., Nat. Commun. 8, 13985 (2017).

[2] T. Kosub et al., Phys. Rev. Lett. 115, 097201 (2015).

[3] T. Kosub et al., Appl. Phys. Lett., (2018), doi: 10.1063/1.5053902.

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