Non-Fermi-liquid behavior on an iron-based itinerant electron magnet Fe3Mo3N

Takeshi Waki; Shinsuke Terazawa; Yoshikazu Tabata; Fumiyasu Oba; Chishiro Michioka; Kazuyoshi Yoshimura; Shugo Ikeda; Hisao Kobayashi; Kenji Ohoyama; Hiroyuki Nakamura

doi:10.1143/JPSJ.79.043701

Non-Fermi-liquid behavior on an iron-based itinerant electron magnet Fe₃Mo₃N

Takeshi Waki, Shinsuke Terazawa, Yoshikazu Tabata, Fumiyasu Oba, Chishiro Michioka, Kazuyoshi Yoshimura, Shugo Ikeda, Hisao Kobayashi, Kenji Ohoyama, Hiroyuki Nakamura

Institute for Materials Research (IMR)

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

16 Citations (Scopus)

Abstract

We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe₃Mo₃N. Magnetic susceptibility shows a Curie-Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by ⁵⁷Fe-Mos̈sbauer and neutron diffraction measurements. C=T shows a divergent behavior following -log T at low temperatures and reaches 128 mJ/(f.u.molK²) at 0.5 K. The deviation from the T^2s power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed C/T and X are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe ₃Mo₃N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.

Original language	English
Article number	043701
Journal	journal of the physical society of japan
Volume	79
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.79.043701
Publication status	Published - 2010 Apr 1

Keywords

Fe3Mo3N
Ferromagnetic quantum critical point
Non-Fermi liquid

ASJC Scopus subject areas

Physics and Astronomy(all)

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Non-Fermi-liquid behavior on an iron-based itinerant electron magnet Fe₃Mo₃N. / Waki, Takeshi; Terazawa, Shinsuke; Tabata, Yoshikazu; Oba, Fumiyasu; Michioka, Chishiro; Yoshimura, Kazuyoshi; Ikeda, Shugo; Kobayashi, Hisao; Ohoyama, Kenji; Nakamura, Hiroyuki.

In: journal of the physical society of japan, Vol. 79, No. 4, 043701, 01.04.2010.

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

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abstract = "We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe3Mo3N. Magnetic susceptibility shows a Curie-Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by 57Fe-Mo{\"s}sbauer and neutron diffraction measurements. C=T shows a divergent behavior following -log T at low temperatures and reaches 128 mJ/(f.u.molK2) at 0.5 K. The deviation from the T2s power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed C/T and X are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe 3Mo3N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.",

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author = "Takeshi Waki and Shinsuke Terazawa and Yoshikazu Tabata and Fumiyasu Oba and Chishiro Michioka and Kazuyoshi Yoshimura and Shugo Ikeda and Hisao Kobayashi and Kenji Ohoyama and Hiroyuki Nakamura",

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AU - Waki, Takeshi

AU - Terazawa, Shinsuke

AU - Tabata, Yoshikazu

AU - Oba, Fumiyasu

AU - Michioka, Chishiro

AU - Yoshimura, Kazuyoshi

AU - Ikeda, Shugo

AU - Kobayashi, Hisao

AU - Ohoyama, Kenji

AU - Nakamura, Hiroyuki

PY - 2010/4/1

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N2 - We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe3Mo3N. Magnetic susceptibility shows a Curie-Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by 57Fe-Mos̈sbauer and neutron diffraction measurements. C=T shows a divergent behavior following -log T at low temperatures and reaches 128 mJ/(f.u.molK2) at 0.5 K. The deviation from the T2s power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed C/T and X are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe 3Mo3N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.

AB - We report magnetic, calorimetric, and transport properties of an iron-based itinerant electron magnet Fe3Mo3N. Magnetic susceptibility shows a Curie-Weiss behavior at high temperatures and takes a broad maximum at around 75 K. The absence of magnetic long range order was confirmed by 57Fe-Mos̈sbauer and neutron diffraction measurements. C=T shows a divergent behavior following -log T at low temperatures and reaches 128 mJ/(f.u.molK2) at 0.5 K. The deviation from the T2s power law of resistivity also suggests a non-Fermi-liquid (NFL) behavior. The observed C/T and X are enhanced compared with the values estimated from the theoretical density of states, suggesting a strong magnetic enhancement. The NFL behaviors indicate that Fe 3Mo3N is one of the ideal systems located in the vicinity of the ferromagnetic quantum critical point.

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