Unconventional magnetic phase separation in γ-CoV2O6

Research output: Contribution to journalArticlepeer-review

Authors

  • Lingjia Shen
  • Erik Jellyman
  • E. Canevet
  • Juerg Schefer
  • Z. He
  • M. Itoh

Colleges, School and Institutes

External organisations

  • Paul Scherrer Inst
  • Fujian Institute of Research on the Structure of Matter
  • Tokyo Institute of Technology, Midori, Yokohama

Abstract

We have explored the magnetism in the non-geometrically frustrated spin-chain system γ-CoV2O6 which possesses a complex magnetic exchange network. Our neutron diffraction patterns at low temperatures (T ≤ TN = 6.6 K) are best described by a model in which two magnetic phases coexist in a volume ratio 65(1) : 35(1), with each phase consisting of a single spin modulation. This model fits previous studies and our observations better than the model proposed by Lenertz et al in J. Phys. Chem. C 118, 13981 (2014), which consisted of one phase with two spin modulations. By decreasing the temperature from TN, the minority phase of our model undergoes an incommensurate-commensurate lock-in transition at T = 5.6 K. Based on these results, we propose that phase separation is an alternative approach for degeneracy-lifting in frustrated magnets.

Details

Original languageEnglish
Article number054420
Number of pages6
JournalPhysical Review B
Volume96
Publication statusPublished - 14 Aug 2017