title: Ferromagnetism Induced by Substitution of the Iron(IV) Ion by an Unusual High-Valence Nickel(IV) Ion in Antiferromagnetic SrFeO3.
abstract: Novel cubic perovskites SrFe(1-x)Ni(x)O3 (0≤x≤0.5) with unusual high-valence iron(IV) and nickel(IV) ions were obtained by high-pressure and high-temperature synthesis. Substantial magnetic moments of Ni(IV), which is intrinsically nonmagnetic with a nominal d(6) electron configuration, were induced by the large magnetic moments of Fe(IV) through orbital hybridization with oxygen. As a result, ferromagnetism with the transition temperature (T(c)) above room temperature could be induced.
authors.affiliation: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
authors.forename: Hayato
authors.initials: H
authors.lastname: Seki
authors.affiliation: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Hosaka
authors.affiliation: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Saito
authors.affiliation: Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.|Japan Science and Technology Agency, CREST (Japan), Gokasho, Uji, Kyoto, 611-0011, Japan.
authors.forename: Masaichiro
authors.initials: M
authors.lastname: Mizumaki
authors.affiliation: Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan. shimak@scl.kyoto-u.ac.jp.|Japan Science and Technology Agency, CREST (Japan), Gokasho, Uji, Kyoto, 611-0011, Japan. shimak@scl.kyoto-u.ac.jp.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Shimakawa
keywords: high-pressure chemistry; iron; magnetic properties; nickel; perovskite phases