NMR study of ordered state in NpFeGa

Kambe, Shinsaku ; Sakai, Hironori ; Tokunaga, Yo ; Fujimoto, Tatsuya; Aoki, Dai*; Homma, Yoshiya*; Haga, Yoshinori ; Walstedt, R. E.*; Onuki, Yoshichika*

The ordered state of NpFeGa will be discussed. At T=116K, the first antiferromagnetic phase appears and the second one appears at T*=80K. The second phase is not clear in the present. We report Ga-NMR in this compound. NMR spectrum between T and T* is consistent with neutron scattering measurements which shows that the ordered vector is along the [110] direction with Q=(1/2,1/2,0). However, below T*, Ga (2) (4i site) site spectrum is spilitted due to a symmetry lowering. This cannot be explained with recent polarized neutron scattering study. The orederd phase below T* will be discussed.

Language	:	Japanese
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Meeting title	:	日本物理学会2007年春季大会(物性)
Held date	:	2007/03
Location (city)	:	鹿児島
Location (country)	:	日本
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Keywords	:	no keyword
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Registration No. : BB20062977
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