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; Pulsed-field NMR study on single crystals up to 56 TTokunaga, Yo; Orlova, A.*; Bruyant, N.*; Aoki, Dai*; Mayaffre, H.*; Kr
mer, S.*; Julien, M.-H.*; Berthier, C.*; Horvati
, M.*; Higa, Nonoka; et al.
Physical Review B, 99(8), p.085142_1 - 085142_5, 2019/02
Times Cited Count：6 Percentile：32.35(Materials Science, Multidisciplinary)The heavy-fermion antiferromagnet CeIn exhibits a field-induced anomaly associated with Fermi surface reconstruction at 
45 T, well below the antiferromagnetic (AFM) critical field that exceeds 60 T. In order to explore the origin of this anomaly, we have measured 
In NMR spectra in pulsed magnetic fields up to 56 T using high-quality single crystals. To within experimental resolution, we do not detect any change in the NMR spectra that could suggest a modification in either the character of the hyperfine field or the electric field gradient at In sites through 
. This strongly suggests that the 45 T anomaly cannot be simply ascribed to a field-induced change in the magnetic structure of the AFM state.
; High-field phase diagram near an antiferromagnetic QCPTokunaga, Yo; Orlova, A.*; Bruyant, N.*; Aoki, Dai*; Mayaffre, H.*; Krmer, S.*; Julien, M.-H.*; Berthier, C.*; Horvati, M.*; Sakai, Hironori; et al.
no journal, ,
In order to understand the origin of the field-induced anomaly observed in the heavy-fermion metal CeIn at about 45 T, well before the antiferromagnetic critical field, we have performed a pulsed magnetic field In-NMR study using a single crystal up to 56 Tesla. We confirmed that there is no obvious change of hyperfine fields at In sites even above 45 T. This indicates that there is no structural change at high fields, and further, denies simple explanations of the anomaly as due to a field-induced change of the magnetic structure in CeIn.
Tokunaga, Yo
no journal, ,
We report pulsed-field NMR study in the prototypical heavy fermion material CeIn. The compound exhibits a field-induced anomaly in high field around 45 T. The anomaly is associated with a Fermi surface reconstruction, and has been discussed as the consequence of a Lifshitz transition or a metamagnetic transition, both of which can be driven by strong magnetic field. However, we have not detected any visible change in our pulsed-field NMR spectra that could suggest a modification either in the character of the hyperfine field or in the electric field gradient at In sites. This strongly suggests that the 45 T anomaly cannot be simply ascribed to a field-induced change of the magnetic structure in the antiferromagnetic state.
