ESR measurements on one-dimensional quantum ferrimagnets A 3Cu3(PO4)4 with A = Sr and Ca in submillimeter-wave region

Shojiro Kimura; Hirofumi Ishikawa; Yuji Inagaki; Makoto Yoshida; Susumu Okubo; Hitoshi Ohta; Hiroyuki Nojiri; Alexei A. Belik; Masaki Azuma; Mikio Takano

doi:10.1143/JPSJ.75.094718

ESR measurements on one-dimensional quantum ferrimagnets A ₃Cu₃(PO₄)₄ with A = Sr and Ca in submillimeter-wave region

Shojiro Kimura, Hirofumi Ishikawa, Yuji Inagaki, Makoto Yoshida, Susumu Okubo, Hitoshi Ohta, Hiroyuki Nojiri, Alexei A. Belik, Masaki Azuma, Mikio Takano

Applied Physics

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Abstract

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.

Original language	English
Article number	094718
Journal	journal of the physical society of japan
Volume	75
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.75.094718
Publication status	Published - Sep 1 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.75.094718

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title = "ESR measurements on one-dimensional quantum ferrimagnets A 3Cu3(PO4)4 with A = Sr and Ca in submillimeter-wave region",

abstract = "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.",

author = "Shojiro Kimura and Hirofumi Ishikawa and Yuji Inagaki and Makoto Yoshida and Susumu Okubo and Hitoshi Ohta and Hiroyuki Nojiri and Belik, {Alexei A.} and Masaki Azuma and Mikio Takano",

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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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JF - Journal of the Physical Society of Japan

SN - 0031-9015

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ESR measurements on one-dimensional quantum ferrimagnets A ₃Cu₃(PO₄)₄ with A = Sr and Ca in submillimeter-wave region

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