SR study of CeRhIn under applied pressure

Heffner, R.*; Goko, Tatsuo*; Andreica, D.*; Oishi, Kazuki*; Higemoto, Wataru ; Ito, Takashi ; Amato, A.*; Spehling, J.*; Klauss, H. H.*; Bauer, E. D.*; Thompson, J. D.*; Uemura, Yasutomo*

At ambient pressure CeRhIn is an incommensurate antiferromagnet with Neel temperature $T_{rm N}$ = 3.8 K. The application of pressure reduces $T_{rm N}$ and yields (1) a state in which AFM coexists with superconductivity, and then (2) a superconducting state in the absence of AFM. We report transverse-field muon spin relaxation (SR) measurements at pressures 2.07 and 2.26 GPa in the pure superconducting state of single-crystalline CeRhIn. SR is sensitive to the local field distribution produced by the vortex lattice in a mixed superconducting state, allowing a measurement of the magnetic field penetration depth . We measured $lambda_{ab}(T)$ for applied field along the -axis as a function of temperature , and find $lambda_{ab}$ (0) = 372(5) nm and 338(6) nm for = 2.07 GPa and 2.26 GPa, respectively. The -dependence of the superfluid density $rho_s(T) propto lambda^{-2}(T)$ was found to be with = 1.9(2).

Language	:	English
Journal	:	Journal of Physics; Conference Series
Volume	:	225
Number	:
Pages	:	p.012011_1 - 012011_6
Publication Year/Month	:	2010/06
Meeting title	:	International Symposium on Advanced Science Research Symposium 2009 (ASR 2009)
Held date	:	2009/11
Location (city)	:	Tokai
Location (country)	:	Japan
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1088/1742-6596/225/1/012011
DOI for research data	:
Keywords	:	no keyword
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Article of JAEA R&D Review	:
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Registration No. : BB20110066
JAEA Abstracts No. :
Paper Submission No. : 9084

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