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18 March 2025 |
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Giant widening of interface magnetic layer in almost compensated iron garnet | | Y. B. Kudasov
; M. V. Logunov
; R. V. Kozabaranov
; I. V. Makarov
; V. V. Platonov
; O. M. Surdin
; D. A. Maslov
; A. S. Korshunov
; I. S. Strelkov
; A. I. Stognij
; V. D. Selemir
; S. A. Nikitov
; | | Date: |
1 Jan 2022 | | Abstract: | A two-sublattice ferrimagnet undergoes a transition from a collinear to
canted magnetic phase at magnetic field oriented along an easy magnetization
direction. In this work, we study the transition by means of the
magneto-optical Faraday effect in a thin film of compensated iron garnet
(Lu$_{3-{
m{x}}}$Bi$_{
m{x}}$)(Fe$_{5-{
m{y}}-{
m{z}}}$Ga$_{
m{y}}$Al$_{
m{z}}$)O$_{12}$
grown on Gd$_3$Ga$_5$O$_{12}$ substrate. In the immediate vicinity of the
compensation temperature a precursor of the transition with a complex shape was
observed. Using a special sample with variable thickness we demonstrate an
interfacial origin of the precursor. Diffusion of gadolinium from the substrate
into the film forms a thin intermixed layer with enhanced magnetization. It
induces an extended inhomogeneous magnetic structure in the film. A two-step
shape of the precursor appears due to an easy-plane anisotropy of the
intermixed magnetic layer. We emphasize that an effective width of the
inhomogeneous magnetization distribution in the film grows enormously while
approaching the compensation temperature. | | Source: | arXiv, 2201.00134 | | Services: | Forum | Review | PDF | Favorites | |
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