TY - JOUR
T1 - ESR measurements on one-dimensional quantum ferrimagnets A 3Cu3(PO4)4 with A = Sr and Ca in submillimeter-wave region
AU - Kimura, Shojiro
AU - Ishikawa, Hirofumi
AU - Inagaki, Yuji
AU - Yoshida, Makoto
AU - Okubo, Susumu
AU - Ohta, Hitoshi
AU - Nojiri, Hiroyuki
AU - Belik, Alexei A.
AU - Azuma, Masaki
AU - Takano, Mikio
PY - 2006/9/1
Y1 - 2006/9/1
N2 - We have performed high-frequency ESR measurements on powder and aligned samples of one-dimensional quantum ferrimagnets, A3Cu 3(PO4)4, with A = Sr and Ca. Large shifts of paramagnetic g-values were observed. We explain the observed g-shifts by means of an antiferromagnetic trimer model. Moreover, gradual increases of the linewidth of the ESR spectra are observed, indicating that a short-range correlation between the effective spins on the trimers begins to develop with decreasing temperature below 25 K. Analysis of the ESR signal, taking the local structures around Cu2+ ions into account, indicates quantum nature of A3Cu3(PO4)4 compounds.
AB - We have performed high-frequency ESR measurements on powder and aligned samples of one-dimensional quantum ferrimagnets, A3Cu 3(PO4)4, with A = Sr and Ca. Large shifts of paramagnetic g-values were observed. We explain the observed g-shifts by means of an antiferromagnetic trimer model. Moreover, gradual increases of the linewidth of the ESR spectra are observed, indicating that a short-range correlation between the effective spins on the trimers begins to develop with decreasing temperature below 25 K. Analysis of the ESR signal, taking the local structures around Cu2+ ions into account, indicates quantum nature of A3Cu3(PO4)4 compounds.
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U2 - 10.1143/JPSJ.75.094718
DO - 10.1143/JPSJ.75.094718
M3 - Article
AN - SCOPUS:33847275741
VL - 75
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
M1 - 094718
ER -