Frustrated minority spins in GeNi2O4

M. Matsuda, J. H. Chung, S. Park, T. J. Sato, K. Matsuno, H. Aruga Katori, H. Takagi, K. Kakurai, K. Kamazawa, Y. Tsunoda, I. Kagomiya, C. L. Henley, S. H. Lee

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Recently, two consecutive phase transitions were observed, upon cooling, in an antiferromagnetic spinel GeNi2O4 at T N1=12.1 K and TN2=11.4 K, respectively (Crawford M. K. et al., Phys. Rev. B, 68 (2003) 220408(R)). Using unpolarized and polarized elastic neutron scattering we show that the two transitions are due to the existence of frustrated minority spins in this compound. Upon cooling, at TN1 the spins on the 〈111〉 kagome planes order ferromagnetically in the plane and antiferromagnetically between the planes (phase I), leaving the spins on the 〈111〉 triangular planes that separate the kagome planes frustrated and disordered. At the lower TN2, the triangular spins also order in the 〈111〉 plane (phase II). We also present a scenario involving exchange interactions that qualitatively explains the origin of the two purely magnetic phase transitions.

本文言語English
論文番号37006
ジャーナルEPL
82
3
DOI
出版ステータスPublished - 2008 5月 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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