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Incommensurate to commensurate antiferromagnetism in CeRhAl$$_4$$Si$$_2$$; An $$^{27}$$Al NMR study

Sakai, Hironori   ; Hattori, Taisuke; Tokunaga, Yo  ; Kambe, Shinsaku  ; Ghimire, N. J.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

$$^{27}$$Al nuclear magnetic resonance (NMR) experiments have been performed on a single crystal of CeRhAl$$_4$$Si$$_2$$, which is an antiferromagnetic Kondo-lattice compound with successive antiferromagnetic transitions of $$T_{rm N1}$$=14 K and $$T_{rm N2}$$=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 $$T_{rm N2}$$, but an incommensurate modulation of antiferromagnetic moments is present in the antiferromagnetic state between $$T_{rm N1}$$ and $$T_{rm N2}$$. The spin-lattice relaxation rate suggests that the $$4f$$ electrons behave as local moments at temperatures above $$T_{rm N1}$$.

Language

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English

Journal

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Physical Review B

Volume

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93

Number

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1

Pages

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p.014402_1 - 014402_9

Publication Year/Month

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2016/01

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1103/PhysRevB.93.014402

DOI for research data

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Keywords

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核磁気共鳴; 反強磁性体

Research Facility

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第4研究棟  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:10.64

Category:Materials Science, Multidisciplinary

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