Multi-frequency ESR in the haldane magnet NDMAP below 1 K

T. Kashiwagi, M. Hagiwara, S. Kimura, H. Miyazaki, I. Harada, Z. Honda

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The S=1 quasi-one dimensional Heisenberg antiferromagnet Ni(C 5H14N2)2N3(PF6), abbreviated as NDMAP, has been studied by electron spin resonance (ESR) in a magnetic field exceeding the critical field (Hc) above which this compound shows a long range order (LRO) at sufficiently low temperatures. Our recently developed ESR apparatus with a dilution refrigerator is utilized to study the spin excitations of NDMAP above Hc for Hc, because this compound exhibits the LRO below about 1 K. The spin excitation modes above Hc observed below 1 K do not show any difference from those at 1.5 K and the lowest excitation mode observed at 30 mK in the inelastic neutron experiments above Hc was not observed at about 200 mK in this study. Accordingly, the result suggests that the lowest excitation mode is very sensitive to temperature.

本文言語English
論文番号042083
ジャーナルJournal of Physics: Conference Series
150
4
DOI
出版ステータスPublished - 2009
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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