Giant widening of interface magnetic layer in almost compensated iron garnet
| Autor: | Kudasov, Y. B., Logunov, M. V., Kozabaranov, R. V., Makarov, I. V., Platonov, V. V., Surdin, O. M., Maslov, D. A., Korshunov, A. S., Strelkov, I. S., Stognij, A. I., Selemir, V. D., Nikitov, S. A. |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/5.0086067 |
| Popis: | 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$_{3-{\rm{x}}}$Bi$_{\rm{x}}$)(Fe$_{5-{\rm{y}}-{\rm{z}}}$Ga$_{\rm{y}}$Al$_{\rm{z}}$)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. Comment: 10 pages, 5 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|