Spin transport across antiferromagnets induced by the spin Seebeck effect

Cramer J, Ritzmann U, Dong BW, Jaiswal S, Qiu Z, Saitoh E, Nowak U, Klaeui M (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Journal of Physics D: Applied Physics IOP Publishing: Hybrid Open Access

Book Volume: 51

Article Number: 144004

Journal Issue: 14

DOI: 10.1088/1361-6463/aab223

Abstract

For prospective spintronics devices based on the propagation of pure spin currents, antiferromagnets are an interesting class of materials that potentially entail a number of advantages as compared to ferromagnets. Here, we present a detailed theoretical study of magnonic spin current transport in ferromagnetic-antiferromagnetic multilayers by using atomistic spin dynamics simulations. The relevant length scales of magnonic spin transport in antiferromagnets are determined. We demonstrate the transfer of angular momentum from a ferromagnet into an antiferromagnet due to the excitation of only one magnon branch in the antiferromagnet. As an experimental system, we ascertain the transport across an antiferromagnet in Y3Fe5O12 |Ir20Mn80|Pt heterostructures. We determine the spin transport signals for spin currents generated in the Y3Fe5O12 by the spin Seebeck effect and compare to measurements of the spin Hall magnetoresistance in the heterostructure stack. By means of temperature-dependent and thickness-dependent measurements, we deduce conclusions on the spin transport mechanism across Ir20Mn80 and furthermore correlate it to its paramagnetic-antiferromagnetic phase transition.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Uppsala University SE Sweden (SE) Dalian University of Technology (DUT) / 大连理工大学 CN China (CN) Tohoku University JP Japan (JP) Universität Konstanz DE Germany (DE)

How to cite

APA:

Cramer, J., Ritzmann, U., Dong, B.-W., Jaiswal, S., Qiu, Z., Saitoh, E.,... Klaeui, M. (2018). Spin transport across antiferromagnets induced by the spin Seebeck effect. Journal of Physics D: Applied Physics, 51(14). https://doi.org/10.1088/1361-6463/aab223

MLA:

Cramer, Joel, et al. "Spin transport across antiferromagnets induced by the spin Seebeck effect." Journal of Physics D: Applied Physics 51.14 (2018).

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