TY - JOUR
T1 - Room-temperature ferrimagnetism of anti-site-disordered C a2MnOs O6
AU - Feng, Hai L.
AU - Ghimire, Madhav Prasad
AU - Hu, Zhiwei
AU - Liao, Sheng Chieh
AU - Agrestini, Stefano
AU - Chen, Jie
AU - Yuan, Yahua
AU - Matsushita, Yoshitaka
AU - Tsujimoto, Yoshihiro
AU - Katsuya, Yoshio
AU - Tanaka, Masahiko
AU - Lin, Hong Ji
AU - Chen, Chien Te
AU - Weng, Shih Chang
AU - Valvidares, Manuel
AU - Chen, Kai
AU - Baudelet, Francois
AU - Tanaka, Arata
AU - Greenblatt, Martha
AU - Tjeng, Liu Hao
AU - Yamaura, Kazunari
N1 - Funding Information:
M.P.G. thanks the Alexander von Humboldt Foundation for the financial support through HERMES program and U. Nitzsche for the technical support. This study was supported in part by JSPS KAKENHI Grant No. JP16H04501, a research grant from Nippon Sheet Glass Foundation for Materials and Engineering (#40-37), and Innovative Science and Technology Initiative for Security, ATLA, Japan. We acknowledge support from the Max Planck-POSTECH-Hsinchu Center for Complex Phase Materials. The work in Dresden was partially supported by the Deutsche Forschungsgemeinschaft through SFB 1143 (Project-id 247310070). The synchrotron radiation experiments were performed at the NIMS synchrotron x-ray station at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposals No. 2017A4503, No. 2017B4502, No. 2018A4501, and No. 2018B4502). M.G. acknowledges the support of Grant No. NSF-DMR-1507252 from the United States.
Publisher Copyright:
© 2019 American Physical Society.
PY - 2019/12/16
Y1 - 2019/12/16
N2 - Room-temperature ferrimagnetism was discovered for the anti-site-disordered perovskite Ca2MnOsO6 with Tc=305K. Ca2MnOsO6 crystallizes into an orthorhombic structure with a space group of Pnma, in which Mn and Os share the oxygen-coordinated-octahedral site at an equal ratio without a noticeable ordered arrangement. The material is electrically semiconducting with variable-range-hopping behavior. X-ray absorption spectroscopy confirmed the trivalent state of the Mn and the pentavalent state of the Os. X-ray magnetic circular dichroism spectroscopy reveals that the Mn and Os magnetic moments are aligned antiferromagnetically, thereby classifying the material as a ferrimagnet which is in accordance with band structure calculations. It is intriguing that the magnetic signal of the Os is very weak, and that the observed total magnetic moment is primarily due to the Mn. The Tc=305K is the second highest in the material category of so-called disordered ferromagnets such as CaRu1-xMnxO3, SrRu1-xCrxO3, and CaIr1-xMnxO3, and hence, may support the development of spintronic oxides with relaxed requirements concerning the anti-site disorder of the magnetic ions.
AB - Room-temperature ferrimagnetism was discovered for the anti-site-disordered perovskite Ca2MnOsO6 with Tc=305K. Ca2MnOsO6 crystallizes into an orthorhombic structure with a space group of Pnma, in which Mn and Os share the oxygen-coordinated-octahedral site at an equal ratio without a noticeable ordered arrangement. The material is electrically semiconducting with variable-range-hopping behavior. X-ray absorption spectroscopy confirmed the trivalent state of the Mn and the pentavalent state of the Os. X-ray magnetic circular dichroism spectroscopy reveals that the Mn and Os magnetic moments are aligned antiferromagnetically, thereby classifying the material as a ferrimagnet which is in accordance with band structure calculations. It is intriguing that the magnetic signal of the Os is very weak, and that the observed total magnetic moment is primarily due to the Mn. The Tc=305K is the second highest in the material category of so-called disordered ferromagnets such as CaRu1-xMnxO3, SrRu1-xCrxO3, and CaIr1-xMnxO3, and hence, may support the development of spintronic oxides with relaxed requirements concerning the anti-site disorder of the magnetic ions.
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U2 - 10.1103/PhysRevMaterials.3.124404
DO - 10.1103/PhysRevMaterials.3.124404
M3 - Article
AN - SCOPUS:85077394084
SN - 2475-9953
VL - 3
JO - Physical Review Materials
JF - Physical Review Materials
IS - 12
M1 - 124404
ER -