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Journal Articles

Multipole order and fluctuation in Ce$$_{0.7}$$La$$_{0.3}$$B$$_6$$ studied by resonant X-ray diffraction

Matsumura, Takeshi*; Michimura, Shinji*; Inami, Toshiya; Otsubo, Toru*; Tanida, Hiroshi*; Iga, Fumitoshi*; Sera, Masafumi*

JPS Conference Proceedings (Internet), 3, p.014008_1 - 014008_6, 2014/06

https://doi.org/10.7566/JPSCP.3.014008

We study the $$T_{beta}$$-type antiferro-octupole (AFO) ordered state of Ce$$_{0.7}$$La$$_{0.3}$$B$$_6$$ below 1.5 K by resonant X-ray diffraction in magnetic fields. Multipole moments induced by the field in the AFO phase are identified. In a mean-field model for the $$T_{beta}$$ AFO order within the $$Gamma_8$$ quartet crystal-field ground state, the $$O_{22}$$ and $$O_{20}$$ antiferroquadrupoles (AFQ) are expected as mostly induced AFQ. However, in contrast to this expectation, the main induced moment is found to be the $$O_{xy}$$-type AFQ.

Journal Articles

Evidence for hidden quadrupolar fluctuations behind the octupole order in Ce$$_{0.7}$$La$$_{0.3}$$B$$_6$$ from resonant X-ray diffraction in magnetic fields

Matsumura, Takeshi*; Michimura, Shinji*; Inami, Toshiya; Otsubo, Toru*; Tanida, Hiroshi*; Iga, Fumitoshi*; Sera, Masafumi*

Physical Review B, 89(1), p.014422_1 - 014422_13, 2014/01

https://doi.org/10.1103/PhysRevB.89.014422
 Times Cited Count：14 Percentile：52.23(Materials Science, Multidisciplinary)

The multipole ordered phase in Ce$$_{0.7}$$La$$_{0.3}$$B$$_6$$ (phase IV) has been studied by resonant X-ray diffraction in magnetic fields. By utilizing diamond X-ray phase plates to rotate the incident linear polarization and a conventional crystal analyzer system, full linear polarization analysis has been performed to identify the order parameters. The analysis shows that the $$Gamma_{rm 5g}$$ quadrupoles are more induced by the field than the $$Gamma_{rm 3g}$$ quadrupoles in phase IV, in disagreement with mean-field calculations, in which the $$Gamma_{rm 3g}$$ quadrupole is the main induced moment. Hence, we consider that large fluctuations of the $$Gamma_{rm 5g}$$ quadrupole is hidden behind the primary ordering of the octupole.

Oral presentation

Resonant X-ray diffraction study of multipole ordering in DyPd$$_3$$S$$_4$$

Michimura, Shinji; Inami, Toshiya; Otsubo, Toru*; Matsumura, Takeshi*; Tanida, Hiroshi*; Sera, Masafumi*; Matsuoka, Eiichi*; Watahiki, Masanori*; Tanigaki, Katsumi*; Onodera, Hideya*

no journal, , 

Oral presentation

Resonant X-ray diffraction study of Ce$$_{0.7}$$La$$_{0.3}$$B$$_{6}$$ in magnetic field

Michimura, Shinji; Inami, Toshiya; Otsubo, Toru*; Matsumura, Takeshi*; Tanida, Hiroshi*; Sera, Masafumi*; Iga, Fumitoshi*

no journal, , 

no abstracts in English

Oral presentation

Study of a multipole ordering in DyPd$$_3$$S$$_4$$ by a resonant X-ray diffraction

Michimura, Shinji; Inami, Toshiya; Otsubo, Toru*; Matsumura, Takeshi*; Tanida, Hiroshi*; Sera, Masafumi*; Matsuoka, Eiichi*; Watahiki, Masanori*; Tanigaki, Katsumi*; Onodera, Hideya*

no journal, , 

no abstracts in English

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