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 journalArticle

5 Citations (Scopus)

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.

Original languageEnglish
Article number010201
JournalJapanese journal of applied physics
Volume48
Issue number1
DOIs
Publication statusPublished - 2009 Jan 20

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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