Multi-frequency ESR studies on a Haldane magnet in a field-induced phase at ultra-low temperatures

Masayuki Hagiwara, Takanari Kashiwagi, Yuichi Idutsu, Zentaro Honda, Hiroshi Miyazaki, Isao Harada

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We report the results of multi-frequency electron spin resonance (ESR) measurements on single crystals of Ni(C5H14N 2)2N3(PF6) which is regarded as the one-dimensional Heisenberg antiferromagnet with spin one, namely the Haldane magnet, at very low temperatures down to about 100 mK. We observed the lowest resonance branch below about 500 mK for the field along the chain direction (H||c), which was observed previously only in an inelastic neutron scattering experiment at 30 mK. We compare the resonance branch with that calculated by a phenomenological field theory, and discuss the field dependence and the temperature sensitivity of this ESR branch.

Original languageEnglish
Article number022012
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 2
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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