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首页> 外文期刊>Physical review.B.Condensed matter and materials physics >NMR study of magnetic structure and hyperfine interactions in the binary helimagnet FeP
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NMR study of magnetic structure and hyperfine interactions in the binary helimagnet FeP

机译：BINARING HELIMAGNET FEP中磁性结构和高浓缩相互作用的NMR研究

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摘要

We report a detailed study of the ground-state helical magnetic structure in monophosphide FeP by means of ~(31)P NMR spectroscopy. We show that the zero-field NMR spectrum of the polycrystalline sample provides strong evidence of an anisotropic distribution of local magnetic fields at the P site with substantially lower anharmonicily than that found at the Fe site by Mossbauer spectroscopy. From field-sweep ~(31)P NMR spectra we conclude that a continuous spin-reorientation transition occurs in an external magnetic field range of 4-7 T, which is also confirmed by specific-heat measurements. We observe two pairs of magnetically inequivalent phosphorus positions resulting in a pronounced four-peak structure of the single crystal ~(31)P NMR spectra characteristic of an incommensurate helimagnetic ground state. We revealed a spatial redistribution of local fields at the P sites caused by Fe spin-reorientation transition in high fields and developed an effective approach to account for it. We demonstrate that all observed ~(31)P spectra can be treated within a model of an isotropic helix of Fe magnetic moments in the (ab)-plane with a phase shift of 36 and 176 between Fel-Fe3 (Fe2-Fe4) and Fel-Fe2 (Fe3-Fe4) sites, respectively, in accordance with the neutron scattering data.
机译：通过〜（31）P NMR光谱，通过〜（31）p型CEP在单晶晶中的地态螺旋磁结构进行详细研究。我们表明，多晶样品的零场NMR谱提供了强大的证据证明，P网站上的局部磁场的各向异性分布，比莫斯贝尔光谱法在Fe位点上发现的anharmonicily。从现场扫描〜（31）P NMR光谱，我们得出结论，在4-7 T的外部磁场范围内发生连续的旋转重新定位过渡，这也通过特定热测量来证实。我们观察两对磁性不等价值的磷位置，导致单晶〜（31）P NMR光谱特征的明显的四峰结构。我们揭示了在高领域的FE旋转重新定向转换引起的P网站上的本地领域的空间再分布，并开发了一种有效的方法来解释它。我们证明所有观察到的〜（31）p光谱可以在（AB）-Plane中的Fe磁矩的各向同性螺旋模型中，相移36和176之间（Fe2-Fe4）和FEL-FE2（FE3-FE4）位点，分别根据中子散射数据。

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  • 来源
    《Physical review.B.Condensed matter and materials physics》 |2020年第21期|214416.1-214416.12|共12页
  • 作者

    A. A. Gippius; A. V. Tkachev; S. V. Zhurenko; A. V. Mahajan; N. Buettgen; M. Schaedler; I. O. Chernyavskii; I. V. Morozov; S. Aswartham; B. Buechner; A. S. Moskvin;

  • 作者单位

    Department of Physics Lomonosov Moscow State University 119991 Moscow Russia and P.N. Lebedev Physics Institute Moscow 119991 Russia;

    P.N. Lehedev Physics Institute Moscow 119991 Russia;

    P.N. Lehedev Physics Institute Moscow 119991 Russia;

    Department of Physics Indian Institute of Technology Bombay Powai Mumbai 400076 India;

    Experimental Physics V University of Augsburg 86159 Augsburg Germany;

    Experimental Physics V University of Augsburg 86159 Augsburg Germany;

    Department of Chemistry Lomonosov Moscow State University 119991 Moscow Russia;

    Department of Chemistry Lomonosov Moscow State University 119991 Moscow Russia;

    Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstrasse 20 D-01069 Dresden Germany;

    Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstrasse 20 D-01069 Dresden Germany;

    Institute of Natural Sciences and Mathematics Ural Federal University 620083 Ekaterinburg Russia;

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