239 citations · 1.6k across the 79 of their papers we have counts for
68 papers · 1 filter
Control of conductivity in Fe-rich cobalt-ferrite thin films with perpendicular magnetic anisotropy
Masaya Morishita, Tomoyuki Ichikawa, Masaaki A. Tanaka +5
We fabricated two types of cobalt-ferrite (001) thin films, insulative Fe-rich cobalt-ferrite CoxFe3-xO4+δ (I-CFO) and conductive Fe-rich cobalt-ferrite CoyFe3-yO4 (C-CFO), with pe…
Scattering-dependent transport of SrRuO3 films: From Weyl fermion transport to hump-like Hall effect anomaly
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger +5
Recent observation of quantum transport phenomena of Weyl fermions has brought much attention to 4d ferromagnetic perovskite SrRuO3 as a magnetic Weyl semimetal. Besides, the hump-…
Origin of Perpendicular Magnetic Anisotropy in CoFeO Thin Films Studied by X-ray Magnetic Circular and Linear Dichroisms
Jun Okabayashi, Masaaki A. Tanaka, Masaya Morishita +2
We investigate the element-specific spin and orbital states and their roles on magnetic anisotropy in the Co-ferrite (CoFeO (001)) thin films which exhibit perp…
Theoretical analysis of the inverse Edelstein effect at the LaAlO / SrTiO interface with an effective tight-binding model: Important role of the second subband
Shoma Arai, Shingo Kaneta-Takada, Le Duc Anh +2
The two-dimensional electron gas formed at interfaces between SrTiO and other materials has attracted much attention since extremely efficient spin-to-charge current conversion…
Room-temperature spin injection and spin-to-charge conversion in a ferromagnetic semiconductor / topological insulator heterostructure
Shobhit Goel, Nguyen Huynh Duy Khang, Le Duc Anh +2
Spin injection using ferromagnetic semiconductors at room temperature is a building block for the realization of spin-functional semiconductor devices. Nevertheless, this has been…
Growth and characterization of quaternary-alloy ferromagnetic semiconductor (In,Ga,Fe)Sb
Tomoki Hotta, Kengo Takase, Kosuke Takiguchi +3
We study the growth and properties of quaternary-alloy ferromagnetic semiconductor (FMS) (In0.94-x,Gax,Fe0.06)Sb (x = 5% - 30%, Fe concentration is fixed at 6%) grown by low temper…
High-mobility two-dimensional carriers from surface Fermi arcs in magnetic Weyl semimetal films
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger +10
High-mobility two-dimensional carriers originating from surface Fermi arcs in magnetic Weyl semimetals are highly desired for accessing exotic quantum transport phenomena and for t…
Elemental topological Dirac semimetal α-Sn with high quantum mobility
Le Duc Anh, Kengo Takase, Takahiro Chiba +3
α-Sn with a diamond-type crystal structure provides an ideal avenue to investigate novel topological properties owing to its rich diagram of topological phases and simple elemental…
Inter-valence charge transfer and charge transport in the spinel ferrite ferromagnetic semiconductor Ru-doped CoFeO
Masaki Kobayashi, Munetoshi Seki, Masahiro Suzuki +6
Inter-valence charge transfer (IVCT) is electron transfer between two metal sites differing in oxidation states through a bridging ligand: $M^{n+1} + M'^{m} \rightarrow M^{n} +…
Structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films prepared by molecular beam epitaxy: comparison with stoichiometric SrRuO3
Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger +5
We investigate structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films prepared by molecular beam epitaxy on (001) SrTiO3 substrates. To distinguish the inf…
Thickness-dependent quantum transport of Weyl fermions in ultra-high-quality SrRuO3 films
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger +4
The recent observation of Weyl fermions in the itinerant 4d ferromagnetic perovskite SrRuO3 points to this material being a good platform for exploring novel physics related to a p…
Minority-Spin Impurity Band in n-Type (In,Fe)As: A Materials Perspective for Ferromagnetic Semiconductors
Masaki Kobayashi, Le Duc Anh, Jan Minar +9
Fully understanding the properties of n-type ferromagnetic semiconductors (FMSs), complementary to the mainstream p-type ones, is a challenging goal in semiconductor spintronics be…
Alternation of Magnetic Anisotropy Accompanied by Metal-Insulator Transition in Strained Ultrathin Manganite Heterostructures
Masaki Kobayashi, Le Duc Anh, Masahiro Suzuki +6
Fundamental understanding of interfacial magnetic properties in ferromagnetic heterostructures is essential to utilize ferromagnetic materials for spintronic device applications. I…
Evolution of the Fe-3 impurity band state as the origin of high Curie temperature in p-type ferromagnetic semiconductor (Ga,Fe)Sb
Takahito Takeda, Shoya Sakamoto, Kohsei Araki +8
(Ga,Fe)Sb is one of the promising ferromagnetic semiconductors for spintronic device applications because its Curie temperature () is above 300 K when the Fe…
Current-in-plane spin-valve magnetoresistance in ferromagnetic semiconductor (Ga,Fe)Sb heterostructures with high Curie temperature
Kengo Takase, Le Duc Anh, Kosuke Takiguchi +1
We demonstrate spin-valve magnetoresistance with a current-in-plane (CIP) configuration in (Ga,Fe)Sb / InAs (thickness nm) / (Ga,Fe)Sb trilayer heterostructures,…
Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures
Le Duc Anh, Taiki Hayakawa, Yuji Nakagawa +6
Material structures containing tetrahedral FeAs bonds, depending on their density and geometrical distribution, can host several competing quantum ground states ranging from superc…
Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
Kosuke Takiguchi, Yuki K. Wakabayashi, Hiroshi Irie +8
Magnetic Weyl fermions, which occur in magnets, have novel transport phenomena related to pairs of Weyl nodes, and they are, of both, scientific and technological interest, with th…
Hybridization between the ligand band and Fe-3 orbitals in the p-type ferromagnetic semiconductor (Ga,Fe)Sb
Takahito Takeda, Masahiro Suzuki, Le Duc Anh +13
(Ga,Fe)Sb is a promising ferromagnetic semiconductor for practical spintronic device applications because its Curie temperature () is above room temperature. However, th…
Characterization of in-gap states in epitaxial CoFe2O4(111) layers grown on Al2O3(111)/Si(111) by resonant inelastic x-ray scattering
Yuki K. Wakabayashi, Takashi Tokushima, Kentaro Kuga +7
We have studied in-gap states in epitaxial CoFe2O4(111), which potentially acts as a perfect spin filter, grown on a Al2O3(111)/Si(111) structure by using ellipsometry, Fe L2,3-edg…
In-plane to perpendicular magnetic anisotropy switching in heavily-Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb with high Curie temperature
Shobhit Goel, Le Duc Anh, Nguyen Thanh Tu +2
We report switching of magnetic anisotropy (MA) from in-plane to perpendicular with increasing the thickness d of a (001)-oriented ferromagnetic-semiconductor (FMS) (Ga0.7,Fe0.3)Sb…
Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO3
Shinobu Ohya, Daisei Araki, Le Duc Anh +4
We demonstrate efficient intrinsic spin-to-charge current conversion in a two-dimensional electron gas using an all-epitaxial single-crystal heterostructure of LaSrMnO3/ LaAlO3 (LA…
Ultra-low-power orbital-controlled magnetization switching using a ferromagnetic oxide interface
Le Duc Anh, Takashi Yamashita, Hiroki Yamasaki +5
A major challenge in spin-based electronics is reducing power consumption for magnetization switching of ferromagnets, which is being implemented by injecting a large spin-polarize…
Heavily Fe-doped n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature and large magnetic anisotropy
Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh +1
We present high-temperature ferromagnetism and large magnetic anisotropy in heavily Fe-doped n-type ferromagnetic semiconductor (In1-x,Fex)Sb (x = 20 - 35%) thin films grown by low…
Systematic study of the electronic structure and the magnetic properties of a few-nm-thick epitaxial (Ni1-xCox)Fe2O4 (x = 0 - 1) layers grown on Al2O3(111)/Si(111) using soft X-ray magnetic circular dichroism: effects of cation distribution
Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda +10
We study the electronic structure and the magnetic properties of epitaxial (Ni1-xCox)Fe2O4(111) layers (x = 0 - 1) with thicknesses d = 1.7 - 5.2 nm grown on Al2O3(111)/Si(111) str…