Magnetic correlation in the ordered phase of CeOs4Sb 12

Kazuaki Iwasa; Shouhei Itobe; Changping Yang; Youichi Murakami; Masahumi Kohgi; Keitaro Kuwahara; Hitoshi Sugawara; Hideyuki Sato; Naofumi Aso; Takashi Tayama; Toshiro Sakakibara

doi:10.1143/JPSJS.77SA.318

Magnetic correlation in the ordered phase of CeOs₄Sb ₁₂

Kazuaki Iwasa, Shouhei Itobe, Changping Yang, Youichi Murakami, Masahumi Kohgi, Keitaro Kuwahara, Hitoshi Sugawara, Hideyuki Sato, Naofumi Aso, Takashi Tayama, Toshiro Sakakibara

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We performed neutron diffraction and magnetization measurements to reveal the nature of phase transition of a Kondo semiconductor CeOs₄Sb ₁₂. Weak antiferromagnetic (AFM) reflections characterized by a wave vector q = (1 0 0) were observed, and the ordered moment value is around 0.07μ_B/Ce at zero magnetic field. The AFM structure is rapidly suppressed by magnetic field of 1 T, in contrast to the transition temperature suggested to be enhanced by magnetic field. Only ferromagnetic correlation is observed above 1 T. Such drastic variation of the magnetic correlation is closely connected into the transport properties; the AFM ordered phase below 1 T and the induced ferromagnetic state above 1 T correspond to the semiconducting and metallic states, respectively.

Original language	English
Pages (from-to)	318-320
Number of pages	3
Journal	journal of the physical society of japan
Volume	77
Issue number	SUPPL.A
DOIs	https://doi.org/10.1143/JPSJS.77SA.318
Publication status	Published - 2008
Externally published	Yes

Keywords

C-f hybridization
Kondo semiconductor
Weak magnetism

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJS.77SA.318

Cite this

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title = "Magnetic correlation in the ordered phase of CeOs4Sb 12",

abstract = "We performed neutron diffraction and magnetization measurements to reveal the nature of phase transition of a Kondo semiconductor CeOs4Sb 12. Weak antiferromagnetic (AFM) reflections characterized by a wave vector q = (1 0 0) were observed, and the ordered moment value is around 0.07μB/Ce at zero magnetic field. The AFM structure is rapidly suppressed by magnetic field of 1 T, in contrast to the transition temperature suggested to be enhanced by magnetic field. Only ferromagnetic correlation is observed above 1 T. Such drastic variation of the magnetic correlation is closely connected into the transport properties; the AFM ordered phase below 1 T and the induced ferromagnetic state above 1 T correspond to the semiconducting and metallic states, respectively.",

keywords = "C-f hybridization, Kondo semiconductor, Weak magnetism",

author = "Kazuaki Iwasa and Shouhei Itobe and Changping Yang and Youichi Murakami and Masahumi Kohgi and Keitaro Kuwahara and Hitoshi Sugawara and Hideyuki Sato and Naofumi Aso and Takashi Tayama and Toshiro Sakakibara",

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TY - JOUR

T1 - Magnetic correlation in the ordered phase of CeOs4Sb 12

AU - Iwasa, Kazuaki

AU - Itobe, Shouhei

AU - Yang, Changping

AU - Murakami, Youichi

AU - Kohgi, Masahumi

AU - Kuwahara, Keitaro

AU - Sugawara, Hitoshi

AU - Sato, Hideyuki

AU - Aso, Naofumi

AU - Tayama, Takashi

AU - Sakakibara, Toshiro

PY - 2008

Y1 - 2008

N2 - We performed neutron diffraction and magnetization measurements to reveal the nature of phase transition of a Kondo semiconductor CeOs4Sb 12. Weak antiferromagnetic (AFM) reflections characterized by a wave vector q = (1 0 0) were observed, and the ordered moment value is around 0.07μB/Ce at zero magnetic field. The AFM structure is rapidly suppressed by magnetic field of 1 T, in contrast to the transition temperature suggested to be enhanced by magnetic field. Only ferromagnetic correlation is observed above 1 T. Such drastic variation of the magnetic correlation is closely connected into the transport properties; the AFM ordered phase below 1 T and the induced ferromagnetic state above 1 T correspond to the semiconducting and metallic states, respectively.

AB - We performed neutron diffraction and magnetization measurements to reveal the nature of phase transition of a Kondo semiconductor CeOs4Sb 12. Weak antiferromagnetic (AFM) reflections characterized by a wave vector q = (1 0 0) were observed, and the ordered moment value is around 0.07μB/Ce at zero magnetic field. The AFM structure is rapidly suppressed by magnetic field of 1 T, in contrast to the transition temperature suggested to be enhanced by magnetic field. Only ferromagnetic correlation is observed above 1 T. Such drastic variation of the magnetic correlation is closely connected into the transport properties; the AFM ordered phase below 1 T and the induced ferromagnetic state above 1 T correspond to the semiconducting and metallic states, respectively.

KW - C-f hybridization

KW - Kondo semiconductor

KW - Weak magnetism

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