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Metastable 1/3 magnetization plateau and memory effects in spin-chain compound α-CoV2O6

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Abstract

We demonstrate the metastable 1/3 magnetization plateau and memory effect in Ising spin-chain system α-CoV2O6 by magnetic relaxation measurements. The metastability of magnetization plateau below 8 K (<T N = 15 K) in the bulk sample can be ascribed to a competition between magnetic, strain, and thermal energies. The memory effect is observed below 8 K in nanocrystals, which is absent in the bulk material. The amazing memory effect can be described by the phenomenological hierarchical model, and its origin is due to spin-glass-like freezing arising from complicated competing interactions associated with core and shell, according the core–shell model of antiferromagnetic nanoparticles.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 11474110).

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Authors and Affiliations

  1. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    Y. C. Sun, Z. W. Ouyang, H. Shu & Z. C. Xia

  2. School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    Y. C. Sun & H. Shu

  3. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, People’s Republic of China

    Guanghui Rao

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  1. Y. C. Sun
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  2. Z. W. Ouyang
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Correspondence to Z. W. Ouyang.

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Sun, Y.C., Ouyang, Z.W., Shu, H. et al. Metastable 1/3 magnetization plateau and memory effects in spin-chain compound α-CoV2O6 . Appl. Phys. A 122, 832 (2016). https://doi.org/10.1007/s00339-016-0344-9

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