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Direct Observation of Magnetic Proximity Effects in Amorphous Exchange-Spring Magnets by Neutron Reflectometry

Published

Author(s)

A. J. Qviller, C. Frommen, B. C. Hauback, F. Magnus, Brian Kirby, B. Hjorvarsson

Abstract

In this letter we report a direct observation of a magnetic proximity effect in an amorphous thin film exchange-spring magnet by the use of neutron reflectometry. The exchange-spring magnet is a trilayer consisting of two ferromagnetic layers with high Τc's separated by a ferromagnetic layer, which is engineered to hav ea significantly lower Τc than the embedding layers. This enables us to measure magnetization depth profiles at which the low T}c material is in a ferromagnetic or paramagnetic state, while the embedding layers are ferromagnetic. A clear proximity effect is observed 7 K above the Τc of the embedded layer, with a range extending 50 angstrom}.
Citation
Physical Review Materials
Volume
4
Issue
10

Keywords

Neutron Reflectometry, Magnetic Multilayers

Citation

Qviller, A. , Frommen, C. , Hauback, B. , Magnus, F. , Kirby, B. and Hjorvarsson, B. (2020), Direct Observation of Magnetic Proximity Effects in Amorphous Exchange-Spring Magnets by Neutron Reflectometry, Physical Review Materials (Accessed May 26, 2024)

Issues

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Created October 6, 2020, Updated September 7, 2021