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Ferromagnetism at 230 K in (Ba0.7K0.3)(Zn0.85Mn0.15)2As2 diluted magnetic semiconductor

  • Letter
  • Condensed Matter Physics
  • Published:
Chinese Science Bulletin

Abstract

We report the ferromagnetism with Cure temperature T c at 230 K in a new diluted magnetic semiconductor (DMS) (Ba0.7K0.3)(Zn0.85Mn0.15)2As2 isostructural to ferropnictide 122 superconductors synthesized via low temperature sintering. Spin is doped by isovalence substitution of Mn2+for Zn2+, while charge is introduced by heterovalence substitution of K1+ for Ba2+ in (Ba0.7K0.3)(Zn0.85Mn0.15)2As2 DMS, being different from (Ga,Mn)As where both spin & charge are induced simultaneously by heterovalence substation of Mn2+ for Ga3+. The (Ba0.7K0.3)(Zn0.85Mn0.15)2As2 DMS shows spontaneous magnetization following T 3/2 dependence expected for a homogeneous ferromagnet with saturation moment 1.0μ B for each Mn atom.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China and the Ministry of Science and Technology (MOST) of China. We are grateful to Prof. Uemura, Prof. F.L. Ning and Prof. Maekawa for helpful discussions.

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Authors and Affiliations

  1. Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China

    Kan Zhao, Bijuan Chen, Guoqiang Zhao, Zhen Yuan, Qingqing Liu, Zheng Deng, Jinlong Zhu & Changqing Jin

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  1. Kan Zhao
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  2. Bijuan Chen
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  3. Guoqiang Zhao
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  4. Zhen Yuan
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  5. Qingqing Liu
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  7. Jinlong Zhu
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  8. Changqing Jin
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Correspondence to Changqing Jin.

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Zhao, K., Chen, B., Zhao, G. et al. Ferromagnetism at 230 K in (Ba0.7K0.3)(Zn0.85Mn0.15)2As2 diluted magnetic semiconductor. Chin. Sci. Bull. 59, 2524–2527 (2014). https://doi.org/10.1007/s11434-014-0398-z

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  • DOI: https://doi.org/10.1007/s11434-014-0398-z

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