Magnetotransport property of the hole-doped delafossite CuCr0.97Mg0.03O2 with a Spin-3/2 antiferromagnetic triangular sublattice

Tetsuji Okuda; Satoshi Oozono; Takumi Kihara; Masashi Tokunaga

doi:10.3938/jkps.62.2168

Magnetotransport property of the hole-doped delafossite CuCr_0.97Mg_0.03O₂ with a Spin-3/2 antiferromagnetic triangular sublattice

Tetsuji Okuda, Satoshi Oozono, Takumi Kihara, Masashi Tokunaga

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

1 Citation (Scopus)

Abstract

The magnetotransport property of a hole-doped delafossite CuCr_0.97Mg_0.03O₂ with a spin-3/2 antiferromagnetic (AF) triangular sublattice was investigated by using a pulsed high magnetic field. A dramatic change of magnetoresistance was observed with a variation of temperature, which indicates that a spin fluctuation due to a competition between the AF and the ferromagnetic Hund's interactions is enhanced at temperatures around the Néel temperatures (T _N). The competition may lead to a partially-disordered state at temperatures below T _N which may cause a nontrivial promotion of a 120° Néel state.

Original language	English
Pages (from-to)	2168-2172
Number of pages	5
Journal	Journal of the Korean Physical Society
Volume	62
Issue number	12
DOIs	https://doi.org/10.3938/jkps.62.2168
Publication status	Published - Jul 2013
Externally published	Yes

Keywords

Antiferromagnetic triangular lattice
Delafossite
Magnetoresistance

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.3938/jkps.62.2168

Cite this

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title = "Magnetotransport property of the hole-doped delafossite CuCr0.97Mg0.03O2 with a Spin-3/2 antiferromagnetic triangular sublattice",

abstract = "The magnetotransport property of a hole-doped delafossite CuCr0.97Mg0.03O2 with a spin-3/2 antiferromagnetic (AF) triangular sublattice was investigated by using a pulsed high magnetic field. A dramatic change of magnetoresistance was observed with a variation of temperature, which indicates that a spin fluctuation due to a competition between the AF and the ferromagnetic Hund's interactions is enhanced at temperatures around the N{\'e}el temperatures (T N). The competition may lead to a partially-disordered state at temperatures below T N which may cause a nontrivial promotion of a 120° N{\'e}el state.",

keywords = "Antiferromagnetic triangular lattice, Delafossite, Magnetoresistance",

author = "Tetsuji Okuda and Satoshi Oozono and Takumi Kihara and Masashi Tokunaga",

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T1 - Magnetotransport property of the hole-doped delafossite CuCr0.97Mg0.03O2 with a Spin-3/2 antiferromagnetic triangular sublattice

AU - Okuda, Tetsuji

AU - Oozono, Satoshi

AU - Kihara, Takumi

AU - Tokunaga, Masashi

PY - 2013/7

Y1 - 2013/7

N2 - The magnetotransport property of a hole-doped delafossite CuCr0.97Mg0.03O2 with a spin-3/2 antiferromagnetic (AF) triangular sublattice was investigated by using a pulsed high magnetic field. A dramatic change of magnetoresistance was observed with a variation of temperature, which indicates that a spin fluctuation due to a competition between the AF and the ferromagnetic Hund's interactions is enhanced at temperatures around the Néel temperatures (T N). The competition may lead to a partially-disordered state at temperatures below T N which may cause a nontrivial promotion of a 120° Néel state.

AB - The magnetotransport property of a hole-doped delafossite CuCr0.97Mg0.03O2 with a spin-3/2 antiferromagnetic (AF) triangular sublattice was investigated by using a pulsed high magnetic field. A dramatic change of magnetoresistance was observed with a variation of temperature, which indicates that a spin fluctuation due to a competition between the AF and the ferromagnetic Hund's interactions is enhanced at temperatures around the Néel temperatures (T N). The competition may lead to a partially-disordered state at temperatures below T N which may cause a nontrivial promotion of a 120° Néel state.

KW - Antiferromagnetic triangular lattice

KW - Delafossite

KW - Magnetoresistance

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