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首页> 外文期刊>Physical review >Incommensurate to commensurate antiferromagnetism in CeRhAl_4Si_2: An ~(27)Al NMR study
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Incommensurate to commensurate antiferromagnetism in CeRhAl_4Si_2: An ~(27)Al NMR study

机译：CeRhAl_4Si_2中反铁磁不相称：〜（27）Al NMR研究

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摘要

~(27)Al nuclear magnetic resonance (NMR) experiments have been performed on a single crystal of CeRhAl_4Si_2, which is an antiferromagnetic Kondo-lattice compound with successive antiferromagnetic transitions of T_(N1) = 14 K and T_(N2) = 9 K at zero external field. In the paramagnetic state, the Knight shifts, quadrupolar frequency, and asymmetric parameter of electrical field gradient on the Al sites have been determined, which have local orthorhombic symmetry. The transferred hyperfine coupling constants are also determined. Analysis of the NMR spectra indicates that a commensurate antiferromagnetic structure exists below T_(N2), but an incommensurate modulation of antiferromagnetic moments is present in the antiferromagnetic state between T_(N1) and T_(N2). The spin-lattice relaxation rate suggests that the 4f electrons behave as local moments at temperatures above T_(N1).
机译：已对CeRhAl_4Si_2单晶进行了〜（27）Al核磁共振（NMR）实验，该CeRhAl_4Si_2是一种反铁磁性近藤晶格化合物，具有连续的反铁磁性跃迁T_（N1）= 14 K和T_（N2）= 9 K在零外场。在顺磁状态下，已经确定了Al位置的Knight位移，四极频率和电场梯度的不对称参数，这些参数具有局部正交斜对称性。还确定了转移的超精细耦合常数。 NMR谱分析表明，在T_（N2）以下存在相称的反铁磁结构，但在T_（N1）和T_（N2）之间的反铁磁状态下存在反铁磁矩的不相称调制。自旋晶格弛豫速率表明4f电子在高于T_（N1）的温度下表现为局部矩。

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  • 来源
    《Physical review》 |2016年第1期|014402.1-014402.9|共9页
  • 作者

    H. Sakai; T. Hattori; Y. Tokunaga; S. Kambe; N. J. Ghimire; F. Ronning; E. D. Bauer; J. D. Thompson;

  • 作者单位

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan;

    Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA,Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA;

    Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

    Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

    Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA;

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