Thermal expansion characteristics associated with spin fluctuations under applied magnetic field and high pressure for Lu(Co0.9Ga 0.1)2 laves-phase compound

Motoki Ohta; Asaya Fujita; Kazuaki Fukamichi; Hidekazu Saito; Tomoko Kagayama; Gendo Oomi; Tsuneaki Goto

doi:10.1143/JPSJS.76SA.84

Thermal expansion characteristics associated with spin fluctuations under applied magnetic field and high pressure for Lu(Co_0.9Ga _0.1)₂ laves-phase compound

Motoki Ohta, Asaya Fujita, Kazuaki Fukamichi, Hidekazu Saito, Tomoko Kagayama, Gendo Oomi, Tsuneaki Goto

ENG - Materials Science

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

Abstract

The thermal expansion measurements under several kinds of conditions have been carried out for Lu(Co_0.90Ga_0.10)₂ Laves-phase compound. With decreasing temperature, the significant increase of the thermal expansion due to the spontaneous volume magnetostriction ω_m(T) appears at low temperatures. Under magnetic fields, ω_m(T) spreads over a wide range of temperature due to the induced ferromagnetic moment above T_C. On the other hand, ω_m(T) becomes smaller by applying hydrostatic pressure p, in addition to the significant decrease of T_C. At p=1.1 GPa, ferromagnetic state disappears and the thermal expansion curve becomes close to that of paramagnetic Lu(Co_0.91Ga_0.09)₂

Original language	English
Pages (from-to)	84-85
Number of pages	2
Journal	journal of the physical society of japan
Volume	76
Issue number	SUPPL. A
DOIs	https://doi.org/10.1143/JPSJS.76SA.84
Publication status	Published - 2007

Keywords

Itinerant-electron metamagnetism
Magnetovolume effect
Pressure effect
Spontaneous volume magnetostriction
Thermal expansion

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJS.76SA.84

Cite this

Thermal expansion characteristics associated with spin fluctuations under applied magnetic field and high pressure for Lu(Co_0.9Ga _0.1)₂ laves-phase compound. / Ohta, Motoki; Fujita, Asaya; Fukamichi, Kazuaki; Saito, Hidekazu; Kagayama, Tomoko; Oomi, Gendo; Goto, Tsuneaki.

In: journal of the physical society of japan, Vol. 76, No. SUPPL. A, 2007, p. 84-85.

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

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title = "Thermal expansion characteristics associated with spin fluctuations under applied magnetic field and high pressure for Lu(Co0.9Ga 0.1)2 laves-phase compound",

abstract = "The thermal expansion measurements under several kinds of conditions have been carried out for Lu(Co0.90Ga0.10)2 Laves-phase compound. With decreasing temperature, the significant increase of the thermal expansion due to the spontaneous volume magnetostriction ωm(T) appears at low temperatures. Under magnetic fields, ωm(T) spreads over a wide range of temperature due to the induced ferromagnetic moment above TC. On the other hand, ωm(T) becomes smaller by applying hydrostatic pressure p, in addition to the significant decrease of TC. At p=1.1 GPa, ferromagnetic state disappears and the thermal expansion curve becomes close to that of paramagnetic Lu(Co0.91Ga0.09)2",

keywords = "Itinerant-electron metamagnetism, Magnetovolume effect, Pressure effect, Spontaneous volume magnetostriction, Thermal expansion",

author = "Motoki Ohta and Asaya Fujita and Kazuaki Fukamichi and Hidekazu Saito and Tomoko Kagayama and Gendo Oomi and Tsuneaki Goto",

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T1 - Thermal expansion characteristics associated with spin fluctuations under applied magnetic field and high pressure for Lu(Co0.9Ga 0.1)2 laves-phase compound

AU - Ohta, Motoki

AU - Fujita, Asaya

AU - Fukamichi, Kazuaki

AU - Saito, Hidekazu

AU - Kagayama, Tomoko

AU - Oomi, Gendo

AU - Goto, Tsuneaki

PY - 2007

Y1 - 2007

N2 - The thermal expansion measurements under several kinds of conditions have been carried out for Lu(Co0.90Ga0.10)2 Laves-phase compound. With decreasing temperature, the significant increase of the thermal expansion due to the spontaneous volume magnetostriction ωm(T) appears at low temperatures. Under magnetic fields, ωm(T) spreads over a wide range of temperature due to the induced ferromagnetic moment above TC. On the other hand, ωm(T) becomes smaller by applying hydrostatic pressure p, in addition to the significant decrease of TC. At p=1.1 GPa, ferromagnetic state disappears and the thermal expansion curve becomes close to that of paramagnetic Lu(Co0.91Ga0.09)2

AB - The thermal expansion measurements under several kinds of conditions have been carried out for Lu(Co0.90Ga0.10)2 Laves-phase compound. With decreasing temperature, the significant increase of the thermal expansion due to the spontaneous volume magnetostriction ωm(T) appears at low temperatures. Under magnetic fields, ωm(T) spreads over a wide range of temperature due to the induced ferromagnetic moment above TC. On the other hand, ωm(T) becomes smaller by applying hydrostatic pressure p, in addition to the significant decrease of TC. At p=1.1 GPa, ferromagnetic state disappears and the thermal expansion curve becomes close to that of paramagnetic Lu(Co0.91Ga0.09)2

KW - Itinerant-electron metamagnetism

KW - Magnetovolume effect

KW - Pressure effect

KW - Spontaneous volume magnetostriction

KW - Thermal expansion

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