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Large spontaneous exchange bias in a weak ferromagnet Pb6Ni9(TeO6)(5)

Abstract : We report the magnetic and dielectric behavior of Pb6Ni9(TeO6)(5), a new compound comprising the honeycomb-like layers of S = 1 spins, through detailed structural, magnetic and dielectric investigation. An antiferromagnetic-type transition at 25 K (T-N) with weak-ferromagnetic behavior is revealed. Interestingly, a large value of coercive field of 1.32 T at 2 K is observed. The isothermal magnetization after zero-field-cooled condition, it exhibits the presence of large spontaneous exchange bias (SEB) with a magnitude of 0.19 T at 2 K; which is rare in single bulk materials, especially without external doping. The value of |H-EB| further enhances to 0.24 T under 16 T field-cooled condition, confirming the presence of large exchange bias in the material.
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Contributor : Elisabeth van T Hof <>
Submitted on : Friday, July 5, 2019 - 5:00:47 PM
Last modification on : Wednesday, August 28, 2019 - 4:02:55 PM

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B. Koteswararao, Tanmoy Chakrabarty, Tathamay Basu, Binoy Krishna Hazra, P. V. Srinivasarao, et al.. Large spontaneous exchange bias in a weak ferromagnet Pb6Ni9(TeO6)(5). Scientific Reports, Nature Publishing Group, 2017, 7, pp.25-31. ⟨10.1038/s41598-017-09056-w⟩. ⟨hal-02175407⟩



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