Thermal conductivity characterization in bulk Zn(Mn,Ga)O4 with self-assembled nanocheckerboard structures

Atsuko Kosuga; Ken Kurosaki; Kunio Yubuta; Anek Charoenphakdee; Shinsuke Yamanaka; Ryoji Funahashi

doi:10.1143/JJAP.48.010201

Thermal conductivity characterization in bulk Zn(Mn,Ga)O₄ with self-assembled nanocheckerboard structures

Atsuko Kosuga, Ken Kurosaki, Kunio Yubuta, Anek Charoenphakdee, Shinsuke Yamanaka, Ryoji Funahashi

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

6 Citations (Scopus)

Abstract

The thermal conductivity of intragranular heterogeneous bulk Zn(Mn,Ga)O₄, where two distinct types of rectangular nanorod with different compositions, ZnMn_1.7Ga_0.3O₄ and ZnMn_0.5Ga_1.5O₄, spontaneously interlace to form a cross-sectional checkerboard pattern, was investigated in the temperature range from 303 to 873 K. The thermal conductivity of this intragranular heterogeneous oxide is lower than that of the intergranular analogue and locates below the theoretical minimum limit of the mixture. We show for the first time that this self-assembled nanostructured Zn(Mn,Ga)O₄ can effectively reduce thermal conductivity, providing a new insight into the field of thermoelectric oxides.

Original language	English
Article number	010201
Journal	Japanese journal of applied physics
Volume	48
Issue number	1
DOIs	https://doi.org/10.1143/JJAP.48.010201
Publication status	Published - Jan 20 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)
Physics and Astronomy(all)

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abstract = "The thermal conductivity of intragranular heterogeneous bulk Zn(Mn,Ga)O4, where two distinct types of rectangular nanorod with different compositions, ZnMn1.7Ga0.3O4 and ZnMn0.5Ga1.5O4, spontaneously interlace to form a cross-sectional checkerboard pattern, was investigated in the temperature range from 303 to 873 K. The thermal conductivity of this intragranular heterogeneous oxide is lower than that of the intergranular analogue and locates below the theoretical minimum limit of the mixture. We show for the first time that this self-assembled nanostructured Zn(Mn,Ga)O4 can effectively reduce thermal conductivity, providing a new insight into the field of thermoelectric oxides.",

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AU - Kosuga, Atsuko

AU - Kurosaki, Ken

AU - Yubuta, Kunio

AU - Charoenphakdee, Anek

AU - Yamanaka, Shinsuke

AU - Funahashi, Ryoji

PY - 2009/1/20

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N2 - The thermal conductivity of intragranular heterogeneous bulk Zn(Mn,Ga)O4, where two distinct types of rectangular nanorod with different compositions, ZnMn1.7Ga0.3O4 and ZnMn0.5Ga1.5O4, spontaneously interlace to form a cross-sectional checkerboard pattern, was investigated in the temperature range from 303 to 873 K. The thermal conductivity of this intragranular heterogeneous oxide is lower than that of the intergranular analogue and locates below the theoretical minimum limit of the mixture. We show for the first time that this self-assembled nanostructured Zn(Mn,Ga)O4 can effectively reduce thermal conductivity, providing a new insight into the field of thermoelectric oxides.

AB - The thermal conductivity of intragranular heterogeneous bulk Zn(Mn,Ga)O4, where two distinct types of rectangular nanorod with different compositions, ZnMn1.7Ga0.3O4 and ZnMn0.5Ga1.5O4, spontaneously interlace to form a cross-sectional checkerboard pattern, was investigated in the temperature range from 303 to 873 K. The thermal conductivity of this intragranular heterogeneous oxide is lower than that of the intergranular analogue and locates below the theoretical minimum limit of the mixture. We show for the first time that this self-assembled nanostructured Zn(Mn,Ga)O4 can effectively reduce thermal conductivity, providing a new insight into the field of thermoelectric oxides.

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Thermal conductivity characterization in bulk Zn(Mn,Ga)O₄ with self-assembled nanocheckerboard structures

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