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

作者：Koteswararao B^*; Chakrabarty Tanmoy; Basu Tathamay; Hazra Binoy Krishna; Srinivasarao P V; Paulose P L; Srinath S^*

来源：Scientific Reports, 2017, 7(1): 25-31.

DOI：10.1038/s41598-017-09056-w

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.

• 出版日期2017-8-15