The competition between magnetocrystalline and shape anisotropy on the magnetic and magneto-transport properties of crystallographically aligned CuCr2Se4 thin films
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https://doi.org/10.1016/j.jmmm.2017.07.022https://elib.sfu-kras.ru/handle/2311/70123
Автор:
Edelman, I.
Esters, M.
Johnson, D. C.
Yurkin, G.
Tarasov, A.
Rautsky, M.
Volochaev, M.
Lyashchenko, S.
Ivantsov, R.
Petrov, D.
Solovyov, L. A.
Коллективный автор:
Институт инженерной физики и радиоэлектроники
Базовая кафедра физики твердого тела и нанотехнологий
Дата:
2017-12Журнал:
Journal of Magnetism and Magnetic MaterialsКвартиль журнала в Scopus:
Q1Квартиль журнала в Web of Science:
Q2Библиографическое описание:
Edelman, I. The competition between magnetocrystalline and shape anisotropy on the magnetic and magneto-transport properties of crystallographically aligned CuCr2Se4 thin films [Текст] / I. Edelman, M. Esters, D. C. Johnson, G. Yurkin, A. Tarasov, M. Rautsky, M. Volochaev, S. Lyashchenko, R. Ivantsov, D. Petrov, L. A. Solovyov // Journal of Magnetism and Magnetic Materials. — 2017.Аннотация:
Crystallographically aligned nanocrystalline films of the ferromagnetic spinel CuCr2Se4 were successfully synthesized and their structure and alignment were confirmed by X-ray diffraction and high-resolution transmission electron microscopy. The average size of the crystallites is about 200–250 nm, and their (1 1 1) crystal planes are parallel to the film plane. A good match of the film’s electronic structure to that of bulk CuCr2Se4 is confirmed by transverse Kerr effect measurements. Four easy 〈1 1 1〉 axes are present in the films. One of these axes is oriented perpendicular and three others are oriented at an angle of 19.5° relative to the film plane. The magnetic properties of the films are determined by a competition between the out-of-plane magnetocrystalline anisotropy and the in-plane shape anisotropy. Magnetic measurements show that the dominating type of anisotropy switches from shape to magnetocrystalline anisotropy near 160 K, which leads to a switch of the effective easy axis from inside the film plane at room temperature to perpendicular to the film plane as the temperature decreases. At last, a moderately large, negative value of the low-temperature magnetoresistance was observed for the first time in CuCr2Se4 films.
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