Dilute La-substitutions in CeRhIn studied by means of NMR/NQR techniques

Sakai, Hironori ; Kurita, Nobuyuki*; Miclea, C. F.*; Movshovich, R.*; Lee, H.-O.*; Ronning, F.*; Bauer, E. D.*; Thompson, J. D.*

The effect of dilute La substitution in Ce $_{1-x}$ La $_{x}$ RhIn $_{5}$ (0x0.07) has been investigated microscopically by nuclear magnetic/quadrupole resonance (NMR/NQR). By the dilute La substitutions, the 4 $nu_{rm Q}$ lines for In(1) sites are found to be undisturbed and to have a reasonably narrow width, even in the ordered AF state. These 4 $nu_{rm Q}$ positions in the La-substituted CeRhIn $_{5}$ indicate a decrease of the internal field on In(1) sites, due to the reduction of hyperfine couplings by La substitutions. The spin-lattice relaxation rates ( $1/T_{1}$ ) using these 4 $nu_{rm Q}$ lines at high temperatures can be understood by the reduction of exchange energy and effective moments. On the other hand, $1/T_{1}$ in the AF ordered state can be explained by a gapped Fermi surface and spin fluctuations of uncompensated localized Ce moments near the La ions.

Language	:	English
Journal	:	Journal of the Physical Society of Japan
Volume	:	80
Number	:	Suppl.A
Pages	:	p.SA059_1 - SA059_3
Publication Year/Month	:	2011/07
Meeting title	:	International Conference on Heavy Electrons 2010 (ICHE 2010)
Held date	:	2010/09
Location (city)	:	Hachioji
Location (country)	:	Japan
Patent information	:
PDF	:
Paper URL	:	http://jpsj.ipap.jp/link?JPSJS/80SA/SA059/
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	第4研究棟
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	Los Alamos National Laboratory

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Registration No. : BB20101760
JAEA Abstracts No. : 39001130
Paper Submission No. : 9389

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