Enhancement of room-temperature magnetization in GaFeO3-type single crystals by Al and Sc doping
Ling Wang,
Tsukasa Katayama,
Chaoyue Wang,
Qin Li,
Yun Shi,
Yuqiang Fang,
Fuqiang Huang,
Yinghao Zhu,
Hai-feng Li,
Shintaro Yasui,
Xintang Huang,
Jianding Yu
Affiliations
Ling Wang
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Tsukasa Katayama
Research Institute for Electronic Science, Hokkaido University, N20W10, Kita, Sapporo 001-0020, Japan
Chaoyue Wang
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Qin Li
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Yun Shi
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Yuqiang Fang
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Fuqiang Huang
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
Yinghao Zhu
Institute of Applied Physics and Materials Engineering, University of Macau, Taipa 999078, Macau SAR, China
Hai-feng Li
Institute of Applied Physics and Materials Engineering, University of Macau, Taipa 999078, Macau SAR, China
Shintaro Yasui
Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, Tokyo 152-8550, Japan
Xintang Huang
College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
Jianding Yu
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China
GaFeO3-type oxides are promising multiferroic materials due to the coexistence of spontaneous magnetization and ferroelectric polarization properties at room temperature. As these ferroic properties feature a large anisotropy, single crystals are required. However, the magnetization of GaFeO3-type single crystals remains low at room temperature. In this study, we largely enhanced the magnetization at room temperature of GaFeO3-type single crystals by increasing the Fe content and co-doping Sc3+ and Al3+. Single crystals of AlxSc0.1−xGa0.6Fe1.3O3 (x = 0.01–0.04) were prepared using the optical floating-zone method. The single crystals were rod-shaped, with a diameter and length of ∼6 mm and 7 cm, respectively. X-ray diffraction measurements confirmed the ferroelectric polarization of the crystals. In addition, they exhibited room-temperature ferrimagnetism, with Curie temperature in the range of 326–338 K; the crystals exhibit magnetic anisotropy along the a-axis. The magnetization of the single crystal at 300 K and 0.3 kOe was 13 emu g−1, which is over ten times larger than those of previously reported single crystals with GaFeO3-type crystal structure.
