Magnetic phase transition in PdxCoyO2

Hirotaka Okabe; Masanori Matoba; Mituru Itoh

doi:10.1016/S0921-4526(02)02617-0

Magnetic phase transition in Pd_xCo_yO₂

Hirotaka Okabe, Masanori Matoba, Mituru Itoh

Department of Applied Physics and Physico-Informatics

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

1 Citation (Scopus)

Abstract

The nonstoichiometric compound Pd_x.Co_y,O₂ (x = 0.72,y = 0.68) were carefully prepared by the metathetical reaction and characterized by the measurements of the powder X-ray diffraction, the inductively coupled plasma spectrum, the DC magnetic susceptibility, and the specific heat. The stoichiometric PdC_oO₂ exhibits Pauliparamagnetism, while two magnetic phase transitions were indeed observed in Pd_0.72Co_0.68O₂. The deviation of fieldcooled from zero-field-cooled curves appears below 55 K, indicating a certain kind of antiferromagnetic phase transition. The well-defined cusp is seen with a peak at T_g = 4.5 K, indicating the existence of spin-glass like transition.

Original language	English
Pages (from-to)	948-949
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02617-0
Publication status	Published - 2003 May

Keywords

Delafossite
Magnetic phase transition
PdCoO
Spin-glass
Triangular lattice

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(02)02617-0

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title = "Magnetic phase transition in PdxCoyO2",

abstract = "The nonstoichiometric compound Pdx.Coy,O2 (x = 0.72,y = 0.68) were carefully prepared by the metathetical reaction and characterized by the measurements of the powder X-ray diffraction, the inductively coupled plasma spectrum, the DC magnetic susceptibility, and the specific heat. The stoichiometric PdCoO2 exhibits Pauliparamagnetism, while two magnetic phase transitions were indeed observed in Pd0.72Co0.68O2. The deviation of fieldcooled from zero-field-cooled curves appears below 55 K, indicating a certain kind of antiferromagnetic phase transition. The well-defined cusp is seen with a peak at Tg = 4.5 K, indicating the existence of spin-glass like transition.",

keywords = "Delafossite, Magnetic phase transition, PdCoO, Spin-glass, Triangular lattice",

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journal = "Physica B: Condensed Matter",

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AU - Okabe, Hirotaka

AU - Matoba, Masanori

AU - Itoh, Mituru

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AB - The nonstoichiometric compound Pdx.Coy,O2 (x = 0.72,y = 0.68) were carefully prepared by the metathetical reaction and characterized by the measurements of the powder X-ray diffraction, the inductively coupled plasma spectrum, the DC magnetic susceptibility, and the specific heat. The stoichiometric PdCoO2 exhibits Pauliparamagnetism, while two magnetic phase transitions were indeed observed in Pd0.72Co0.68O2. The deviation of fieldcooled from zero-field-cooled curves appears below 55 K, indicating a certain kind of antiferromagnetic phase transition. The well-defined cusp is seen with a peak at Tg = 4.5 K, indicating the existence of spin-glass like transition.

KW - Delafossite

KW - Magnetic phase transition

KW - PdCoO

KW - Spin-glass

KW - Triangular lattice

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