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Chin. Phys. B, 2022, Vol. 31(9): 097503    DOI: 10.1088/1674-1056/ac7549
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Slight Co-doping tuned magnetic and electric properties on cubic BaFeO3 single crystal

Shijun Qin(覃湜俊)1,2, Bowen Zhou(周博文)1,2, Zhehong Liu(刘哲宏)1,2, Xubin Ye(叶旭斌)1,2, Xueqiang Zhang(张雪强)1, Zhao Pan(潘昭)1,2, and Youwen Long(龙有文)1,2,3,†
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Songshan Lake Materials Laboratory, Dongguan 523808, China
Abstract  The single crystal of cubic perovskite BaFeO$_{3}$ shows multiple magnetic transitions and external stimulus sensitive magnetism. In this paper, a 5%-Co-doped BaFeO$_{3}$ (i.e. BaFe$_{0.95}$Co$_{0.05}$O$_{3})$ single crystal was grown by combining floating zone methods with high-pressure techniques. Such a slight Co doping has little effect on crystal structure, but significantly changes the magnetism from the parent antiferromagnetic ground state to a ferromagnetic one with the Curie temperature $T_{\rm C} \approx 120$ K. Compared with the parent BaFeO$_{3}$ at the induced ferromagnetic state, the saturated magnetic moment of the doped BaFe$_{0.95}$Co$_{0.05}$O$_{3}$ increases by about 10% and reaches 3.64 $\mu_{\rm B}$/f.u. Resistivity and specific heat measurements show that the ferromagnetic ordering favors metallic-like electrical transport behavior for BaFe$_{0.95}$Co$_{0.05}$O$_{3}$. The present work indicates that Co-doping is an effective method to tune the magnetic and electric properties for the cubic perovskite phase of BaFeO$_{3}$.
Keywords:  floating-zone single crystal      high-pressure synthesis      chemical doping      magnetic and electrical properties  
Received:  05 May 2022      Revised:  27 May 2022      Accepted manuscript online:  02 June 2022
PACS:  75.30.Et (Exchange and superexchange interactions)  
  75.10.Lp (Band and itinerant models)  
  81.10.Fq (Growth from melts; zone melting and refining)  
  81.40.Vw (Pressure treatment)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11934017 and 11921004), the National Key Research and Development Program of China (Grant Nos. 2021YFA1400300, 2018YFE0103200, and 2018YFA0305700), the Beijing Natural Science Foundation (Grant No. Z200007), and the Fund from the Chinese Academy of Sciences (Grant No. XDB33000000).
Corresponding Authors:  Youwen Long     E-mail:  ywlong@iphy.ac.cn

Cite this article: 

Shijun Qin(覃湜俊), Bowen Zhou(周博文), Zhehong Liu(刘哲宏), Xubin Ye(叶旭斌), Xueqiang Zhang(张雪强), Zhao Pan(潘昭), and Youwen Long(龙有文) Slight Co-doping tuned magnetic and electric properties on cubic BaFeO3 single crystal 2022 Chin. Phys. B 31 097503

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