Room-temperature spin-glass behaviors and memory effects in Al-substituted Y3Fe5O12 epitaxial film grown by pulsed laser deposition
Source abstract
Abstract
This study explores the magnetic properties of a thin film of Al-substituted Y3Fe5O12 grown on Y3Al5O12 (111) substrates using pulsed laser deposition. Spin-glass behavior was observed near room temperature in the film, with a spin-freezing temperature of 345 K achieved. This temperature is significantly higher than those previously reported for spin-glass systems based on Fe oxides. The film exhibited characteristic memory and rejuvenation effects below the spin-freezing temperature, which are explained by magnetic relaxation via metastable states within a multi-valley energy landscape featuring shallow activation energies. Additionally, photomagnetic memory effects were demonstrated using the magneto-optic effect of the film at room temperature. Our results highlight the potential application of the Al-substituted Y3Fe5O12 film in neuromorphic devices with low energy consumption.
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Research context
OpenAlex topics: Theoretical and Computational Physics · Transition Metal Oxide Nanomaterials · Metallic Glasses and Amorphous Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo 1 , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656,
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo 2 , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656,
Center for Spintronics Research Network (CSRN), Graduate School of Engineering, The University of Tokyo 3 , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656,
Funding
Core Research for Evolutional Science and Technology · Japan Society for the Promotion of Science · Japan Agency for Medical Research and Development
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