NQR measurements of UTGa $_{5}$

Kato, Harukazu; Sakai, Hironori; Kambe, Shinsaku ; Walstedt, R. E.; Tokiwa, Yoshifumi; Onuki, Yoshichika

We performed $^{69,71}$ Ga-NMR/NQR studies for UPtGa $_{5}$ , which is a 5-itinerant antiferromagnets with Neel temperature $T_{N}$ = 26 K and an electronic specific coefficient = 57 mJ/mol K $^{2}$ . From the NMR spectrum in the paramagnetic temperature region, the hyperfine coupling constants $A_{hf}^{para}$ in the paramagnetic state have been evaluated. The magnitude of the transferred field has been evaluated from the zero-applied-field spectrum, yielding a value for the hyperfine coupling constant $A_{hf}^{AF}$ in the antiferromagnetic state. The estimated value of $A_{hf}^{AF}$ is an order of magnitude larger than that of $A_{hf}^{para}$ . This implies the existence of a long-ranged hyperfine interaction path. The mechanism of the hyperfine interaction will be discussed in terms of RKKY interactions.

Language	:	English
Journal	:	Acta Physica Polonica B
Volume	:	34
Number	:	2
Pages	:	p.1063 - 1066
Publication Year/Month	:	2003/09
Meeting title	:	International Conference on Strongly Correlated Electron Systems (SCES 2002)
Held date	:	2002/07
Location (city)	:	Krakow
Location (country)	:	Poland
Patent information	:
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Paper URL	:	http://www.actaphys.uj.edu.pl/_cur/store/vol34/pdf/v34p1063.pdf
DOI for research data	:
Keywords	:	UPtGa $_{5}$ ; NMR; NQR; 超微細相互作用
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Article of JAEA R&D Review	:
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Registration No. : B20020600
JAEA Abstracts No. : 311011
Paper Submission No. : 20462

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