Direct Observation of Magnetic Proximity Effects in Amorphous Exchange-Spring Magnets by Neutron Reflectometry
A. J. Qviller, C. Frommen, B. C. Hauback, F. Magnus, Brian Kirby, B. Hjorvarsson
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}.
, Frommen, C.
, Hauback, B.
, Magnus, F.
, Kirby, B.
and Hjorvarsson, B.
Direct Observation of Magnetic Proximity Effects in Amorphous Exchange-Spring Magnets by Neutron Reflectometry, Physical Review Materials
(Accessed December 2, 2023)