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Magnetic excitations from the linear Heisenberg antiferromagnetic spin trimer system A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ (A=Ca, Sr, and Pb)

直鎖トライマー系A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$(A=Ca, Sr, Pb)の中性子散乱

松田 雅昌; 加倉井 和久; Belik, A. A.*; 東 正樹*; 高野 幹夫*; 藤田 全基*

Matsuda, Masaaki; Kakurai, Kazuhisa; Belik, A. A.*; Azuma, Masaki*; Takano, Mikio*; Fujita, Masaki*

中性子散乱により直鎖トライマー系A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$(A=Ca, Sr, Pb)の磁気励起を測定した。励起スペクトルのエネルギー,Q,温度依存性の解析の結果、これらの物質は典型的なハイゼンベルグ反強磁性直鎖トライマー系であることを明らかにした。また、トライマー内の相互作用をA$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$(A=Ca, Sr, Pb)に対してそれぞれ9.39(4), 9.99(4), 9.07(4)meVと決定した。

Inelastic neutron scattering experiments were performed on A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ (A=Ca, Sr, and Pb), which consists of one-dimensional array of linear copper spin trimers. It was found that the magnetic excitations are well described by the linear Heisenberg antiferromagnetic spin trimer model without adjustable parameters except the overall scale factor. The intra-trimer coupling contants are determined to be 9.39(4), 9.99(4), and 9.07(4) meV for A$$_3$$Cu$$_3$$(PO$$_4$$)$$_4$$ with A=Ca, Sr, and Pb, respectively.

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パーセンタイル:73.55

分野:Materials Science, Multidisciplinary

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