TY - JOUR
T1 - Multi-frequency ESR studies on a Haldane magnet in a field-induced phase at ultra-low temperatures
AU - Hagiwara, Masayuki
AU - Kashiwagi, Takanari
AU - Idutsu, Yuichi
AU - Honda, Zentaro
AU - Miyazaki, Hiroshi
AU - Harada, Isao
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
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U2 - 10.1088/1742-6596/200/2/022012
DO - 10.1088/1742-6596/200/2/022012
M3 - Conference article
AN - SCOPUS:77957136382
SN - 1742-6588
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - SECTION 2
M1 - 022012
ER -