Incommensurate-to-commensurate magnetic phase transition in SmIn observed by muon spin relaxation

Ito, Takashi ; Higemoto, Wataru ; Ninomiya, Kazuhiko; Luetkens, H.*; Sugai, Takashi; Haga, Yoshinori ; Suzuki, Hiroyuki*

Magnetic susceptibility and muon spin relaxation (SR) measurements are reported on SmIn with a ground state. Anomalies corresponding to successive phase transitions were observed in at $T_{rm I}sim$ 16.5 K, $T_{rm II}sim$ 15.1 K, and $T_{rm III}sim$ 14.7 K. A spontaneous local magnetic field was detected below $T_{rm I}$ using the SR technique on the contrary to a pure quadrupolar ordering scenario proposed in the phase between $T_{rm I}$ and $T_{rm II}$ . This result clearly indicates that the primary order parameters in all the ordered phases are magnetic. The local field distribution changes at around $T_{rm II}$ from a continuous broad one to a sharp one with decreasing temperature, suggesting that an incommensurate to commensurate magnetic phase transition takes place at this temperature. A possible magnetic structure in the ground state and importance of multipolar interactions are discussed.

Language	:	English
Journal	:	Journal of the Physical Society of Japan
Volume	:	80
Number	:	3
Pages	:	p.033710_1 - 033710_4
Publication Year/Month	:	2011/03
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Paper URL	:	https://doi.org/10.1143/JPSJ.80.033710
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Keywords	:	no keyword
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Registration No. : AA20100784
JAEA Abstracts No. : 39000527
Paper Submission No. : 8750

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