title: Magnetic and optical properties of MgAl2O4-(Ni0.5Zn0.5)Fe2O4thin films prepared by pulsed laser deposition.
abstract: Thin films composed of MgAl2O4and (Ni0.5Zn0.5)Fe2O4([MA(100-x)-NZFx] films) were grown on fused SiO2substrates by pulsed laser deposition. X-ray diffraction measurements revealed that the films were polycrystalline, and that their lattice constant varied linearly with composition, indicating the formation of a solid solution. The film withx=60 was paramagnetic and those withx≥ 70 were ferromagnetic. The films had a transparency above 75% in the visible range, but the transparency decreased with thexvalue. The optical band gaps were 2.95, 2.55, 2.30 and 1.89 eV forx=20, 40, 60, 80 and 100, respectively. The Faraday rotation angle increased withxin the visible range, and the film withx=70 exhibited a value of 2000 degrees cm-1at 570 nm, which is comparable to the rotation angle of Y3Fe5O12. Owing to their high transparency, which extends into the visible range, the [MA(100-x)-NZFx] films can be used in novel magneto-optical devices.
authors.affiliation: Department of Materials Science and Chemical Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Misu
authors.affiliation: Department of Materials Science and Chemical Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
authors.forename: Naonori
authors.initials: N
authors.lastname: Sakamoto
authors.affiliation: Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Shinozaki
authors.affiliation: Ceramics Research Laboratory, 10-6-29, Asahigaoka, Tajimi, Gifu 507-0071, Japan.
authors.forename: Nobuyasu
authors.initials: N
authors.lastname: Adachi
authors.affiliation: Graduate School of Materials Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
authors.forename: Hisao
authors.initials: H
authors.lastname: Suzuki
authors.affiliation: Department of Materials Science and Chemical Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Wakiya
keywords: Faraday rotation angle; pulsed laser deposition (PLD); solid solution of nickel zinc ferrite and magnesium aluminum spinel; transparent magnetic thin film