Single-pulse all-optical partial switching in amorphous DyxCo1-xand TbxCo1-xwith random anisotropy
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2022Access:
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Hu, Z. and Besbas, J. and Smith, R. and Teichert, N. and Atcheson, G. and Rode, K. and Stamenov, P. and Coey, J.M.D., Single-pulse all-optical partial switching in amorphous DyxCo1-xand TbxCo1-xwith random anisotropy, 2022Download Item:
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Abstract:
Repeated uniform switching of the magnetization of thin films of ferrimagnetic amorphous Gdx (FeCo)1 x in response to single fast laser
pulses is well established. Here, we report unusual toggle switching in thin films of sperimagnetic amorphous Dyx Co 1 x and Tbx Co 1 x with
x 0.25 irradiated with single 200 fs pulses of 800 nm laser light. The samples have strong local random anisotropy due to the non-S state
rare earth. The compensation temperature of the films is 180 K, and their Curie temperature is 500 K. They are largely switched by the
first pulse, and subsequent pulses lead to partial re-switching of a decreasing amount of the irradiated area, with a granular structure of sub-
micrometer regions of switched and unswitched material. Individual switched regions about 700 nm in size are observed around the edge of
the irradiated spots where the fluence is at the threshold for switching. Results are discussed in terms of a random anisotropy model where
the ratio of local anisotropy to exchange is temperature dependent.
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http://people.tcd.ie/jcoeyhttp://people.tcd.ie/stamenp
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Author: Coey, John; Stamenov, Plamen
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uniform switching, thin films, sperimagnetic amorphousDOI:
http://dx.doi.org/10.1063/5.0077226The following license files are associated with this item: