Contrasting Magnetic Behaviors in Rhodium‐ and Ruthenium‐Doped Cubic Perovskite SrFeO3: Nearly Ferromagnetic Metal versus Spin‐Glass Insulator. (2nd November 2016)

• Record Type: Journal Article
• Authors: Kinoshita, Masataka; Sakai, Hideaki; Hayashi, Naoaki; Tokura, Yoshinori; Takano, Mikio; Ishiwata, Shintaro
• Is Part Of: Angewandte Chemie. Volume 128:Number 49(2016)
• Page Start: 15518
• Page End: 15522
• Publication Date: 2016-11-02
• Subjects: Ferromagnetismus -- Hochdrucksynthesen -- Hochvalente Ionen -- Magnetische Eigenschaften -- Perowskit-Phasen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201608222
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The effects of Rh and Ru doping for SrFeO3, a helimagnetic metal with a cubic perovskite structure, are studied by magnetic and resistivity measurements. Although SrRhO3 is a paramagnetic metal and SrRuO3 is a ferromagnetic one, the Rh doping induces a nearly ferromagnetic metallic state, whereas the Ru doping induces a spin‐glass insulating state. Mössbauer measurements evidence a marked difference between SrFe0.8 Rh0.2 O3 and SrFe0.8 Ru0.2 O3 in the formal valences of Fe, which are estimated to be 4+ and 3.75+, respectively. The contrasting magnetic behaviors of Rh‐ and Ru‐doped SrFeO3 are discussed in terms of the subtle balance between the double‐exchange ferromagnetism and the superexchange antiferromagnetism.