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Zero-field NMR and NQR studies of magnetically ordered state in charge-ordered EuPtP

机译：电荷有序EuPtP中磁有序态的零场NMR和NQR研究

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摘要

EuPtP undergoes two valence transitions and has two kinds of valence states of Eu ions at low temperatures. In the charge-ordered state, this compound shows an antiferromagnetic order ascribed to magnetic divalent Eu ions. We investigated the antiferromagnetically ordered state of EuPtP by nuclear magnetic resonance (NMR) measurement and nuclear quadrupole resonance (NQR) measurement in a zero external magnetic field. The observed ~(153)Eu NMR signals of a magnetic divalent state and ~(151,153)Eu NQR signals of a nonmagnetic trivalent state clearly demonstrate that the spins order in the hexagonal basal plane and the internal magnetic field is not canceled out, even at the Eu~(3+) layers which are in the middle of magnetic Eu~(2+) layers. In addition, the observation of ~(31)P and ~(195)Pt NMR spectra allowed us to discuss a possible magnetic structure. We also evaluated the nuclear quadrupole frequencies for both Eu~(2+) and Eu~(3+) ion states.
机译：EuPtP在低温下经历两个价态跃迁，并具有两种价态的Eu离子态。在电荷有序状态下，该化合物显示归因于磁性二价Eu离子的反铁磁有序。我们通过在零外部磁场中的核磁共振（NMR）和核四极共振（NQR）测量研究了EuPtP的反铁磁有序状态。观察到的具有磁性二价态的〜（153）Eu NMR信号和具有非磁性三价态的〜（151,153）Eu NQR信号清楚地表明，六边形基面中的自旋序甚至内部磁场也不会被抵消。在磁性Eu〜（2+）层中间的Eu〜（3+）层。另外，〜（31）P和〜（195）Pt NMR光谱的观察使我们能够讨论可能的磁性结构。我们还评估了Eu〜（2+）和Eu〜（3+）离子态的核四极频率。

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  • 来源
    《Physical review》 |2015年第9期|094419.1-094419.4|共4页
  • 作者

    T. Koyama; T. Maruyama; K. Ueda; T. Mito; A. Mitsuda; M. Umeda; M. Sugishima; H. Wada;

  • 作者单位

    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan;

    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan;

    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan;

    Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan;

    Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan;

    Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan;

    Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan,Division of Technical Support, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan;

    Department of Physics, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan;

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  • 正文语种 eng
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  • 关键词

    valence fluctuation; kondo lattice; and heavy-fermion phenomena; antiferromagnetics; rare-earth ions and impurities; nuclear magnetic resonance and relaxation;

    机译：价波动;近藤格子和重费米子现象;反铁磁稀土离子和杂质;核磁共振与弛豫;

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