Recent progress in ferromagnetic semiconductors and spintronics devices

M Tanaka - Japanese Journal of Applied Physics, 2020 - iopscience.iop.org
By actively using not only charge transport of electrons and holes but also their spins, we
can create a variety of new phenomena and functional materials. It is highly expected that …

Synthesis and high-temperature ferromagnetism of Fe-doped SiGe diluted magnetic semiconductor thin films

J Li, X Zhang, J Lu, W He, Y Nie, Y Peng, G **ang - Nanoscale, 2023 - pubs.rsc.org
Fe-doped SiGe (Si0. 25Ge0. 75: Fex, x= 0.01, 0.025, and 0.05) thin films were prepared by
radio frequency magnetron sputtering and subsequent rapid thermal annealing on a Ge …

Electronic structure and magnetic properties of magnetically dead layers in epitaxial films studied by x-ray magnetic circular dichroism

YK Wakabayashi, Y Nonaka, Y Takeda, S Sakamoto… - Physical Review B, 2017 - APS
Epitaxial CoF e 2 O 4/A l 2 O 3 bilayers are expected to be highly efficient spin injectors into
Si owing to the spin filter effect of CoF e 2 O 4. To exploit the full potential of this system …

Single-domain perpendicular magnetization induced by the coherent O -Ru hybridized state in an ultra-high-quality film

YK Wakabayashi, M Kobayashi, Y Takeda… - Physical Review …, 2021 - APS
We investigated the Ru 4 d and O 2 p electronic structure and magnetic properties of an
ultrahigh-quality SrRu O 3 film on SrTi O 3 grown by machine-learning assisted molecular …

Isotropic orbital magnetic moments in magnetically anisotropic films

YK Wakabayashi, M Kobayashi, Y Takeda… - Physical Review …, 2022 - APS
Epitaxially strained SrRuO 3 films have been a model system for understanding the
magnetic anisotropy in metallic oxides. In this paper, we investigate the anisotropy of the Ru …

Intrinsic physics in magnetic Weyl semimetal SrRuO3 films addressed by machine-learning-assisted molecular beam epitaxy

YK Wakabayashi, Y Krockenberger… - Japanese Journal of …, 2022 - iopscience.iop.org
The itinerant 4d ferromagnetic perovskite SrRuO 3 [bulk Curie temperature (TC)= 165 K] has
been studied extensively for many decades because of the unique nature of its …

Electronic structure of the high- ferromagnetic semiconductor (Ga,Fe)Sb: X-ray magnetic circular dichroism and resonance photoemission spectroscopy studies

S Sakamoto, NT Tu, Y Takeda, S Fujimori, PN Hai… - Physical Review B, 2019 - APS
The electronic structure and the magnetism of the ferromagnetic semiconductor (Ga, Fe) Sb,
whose Curie temperature TC can exceed room temperature, were investigated by means of …

Tunable rectification and magnetoresistance behaviors of ferromagnetic pn diode based on (Fe, Al)-doped SiGe with enhanced room-temperature magnetization

J Li, X Zhang, G **ang - Science China Materials, 2024 - Springer
Group-IV diluted magnetic semiconductors (DMSs) have attracted rising attention owing to
their exceptional magnetic and electrical properties and promising potential for application …

Direct observation of the magnetic ordering process in the ferromagnetic semiconductor Ga1− xMnxAs via soft x-ray magnetic circular dichroism

Y Takeda, S Ohya, NH Pham, M Kobayashi… - Journal of Applied …, 2020 - pubs.aip.org
In order to understand the mechanism of the ferromagnetism in the ferromagnetic
semiconductor Ga 1− x Mn x As [(Ga, Mn) As], we have investigated the magnetic behavior …

[HTML][HTML] Magnetic anisotropy driven by ligand in 4d transition-metal oxide SrRuO3

YK Wakabayashi, M Kobayashi, Y Seki, Y Kotani… - APL Materials, 2024 - pubs.aip.org
The origin of magnetic anisotropy in magnetic compounds is a longstanding issue in
materials science, and nonmagnetic ligand ions are considered to contribute little to …