Herringbone structure in GeTe-based thermoelectric materials

Ho Seong Lee; Bong Seo Kim; Chang Woo Cho; Min Wook Oh; Bok Ki Min; Su Dong Park; Hee Woong Lee

doi:10.1016/j.actamat.2015.03.015

Herringbone structure in GeTe-based thermoelectric materials

Ho Seong Lee, Bong Seo Kim, Chang Woo Cho, Min Wook Oh, Bok Ki Min, Su Dong Park, Hee Woong Lee

Korea Electrotechnology Research Institute

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

89 Scopus citations

Abstract

We investigated the microstructure of GeTe-based thermoelectric materials by using transmission electron microscopy. GeTe-based materials with a rhombohedral structure showed a herringbone structure, which is described as a regular arrangement of domain structures. The crystal region with different rhombohedral axis formed a domain. Domains with different variants showed alternative white and black contrast. We proposed a parallelepiped domain unit surrounded by (0 0 1), (11¯0) and (111¯) planes. Domain units were arranged along a specific direction 〈0 0 1〉 and 〈1 1 0〉, which formed many colonies. Well-aligned colonies comprised various kinds of herringbone structures. Several herringbone structures were described in detail based on the transmission electron microscopy results.

Original language	English
Pages (from-to)	83-90
Number of pages	8
Journal	Acta Materialia
Volume	91
DOIs	https://doi.org/10.1016/j.actamat.2015.03.015
State	Published - 1 Jun 2015

Keywords

Domain unit
GeTe
Microstructure
TEM
Thermoelectric compound

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10.1016/j.actamat.2015.03.015

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title = "Herringbone structure in GeTe-based thermoelectric materials",

abstract = "We investigated the microstructure of GeTe-based thermoelectric materials by using transmission electron microscopy. GeTe-based materials with a rhombohedral structure showed a herringbone structure, which is described as a regular arrangement of domain structures. The crystal region with different rhombohedral axis formed a domain. Domains with different variants showed alternative white and black contrast. We proposed a parallelepiped domain unit surrounded by (0 0 1), (11¯0) and (111¯) planes. Domain units were arranged along a specific direction 〈0 0 1〉 and 〈1 1 0〉, which formed many colonies. Well-aligned colonies comprised various kinds of herringbone structures. Several herringbone structures were described in detail based on the transmission electron microscopy results.",

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AU - Lee, Ho Seong

AU - Kim, Bong Seo

AU - Cho, Chang Woo

AU - Oh, Min Wook

AU - Min, Bok Ki

AU - Park, Su Dong

AU - Lee, Hee Woong

PY - 2015/6/1

Y1 - 2015/6/1

N2 - We investigated the microstructure of GeTe-based thermoelectric materials by using transmission electron microscopy. GeTe-based materials with a rhombohedral structure showed a herringbone structure, which is described as a regular arrangement of domain structures. The crystal region with different rhombohedral axis formed a domain. Domains with different variants showed alternative white and black contrast. We proposed a parallelepiped domain unit surrounded by (0 0 1), (11¯0) and (111¯) planes. Domain units were arranged along a specific direction 〈0 0 1〉 and 〈1 1 0〉, which formed many colonies. Well-aligned colonies comprised various kinds of herringbone structures. Several herringbone structures were described in detail based on the transmission electron microscopy results.

AB - We investigated the microstructure of GeTe-based thermoelectric materials by using transmission electron microscopy. GeTe-based materials with a rhombohedral structure showed a herringbone structure, which is described as a regular arrangement of domain structures. The crystal region with different rhombohedral axis formed a domain. Domains with different variants showed alternative white and black contrast. We proposed a parallelepiped domain unit surrounded by (0 0 1), (11¯0) and (111¯) planes. Domain units were arranged along a specific direction 〈0 0 1〉 and 〈1 1 0〉, which formed many colonies. Well-aligned colonies comprised various kinds of herringbone structures. Several herringbone structures were described in detail based on the transmission electron microscopy results.

KW - Domain unit

KW - GeTe

KW - Microstructure

KW - TEM

KW - Thermoelectric compound

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VL - 91

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JO - Acta Materialia

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ER -

Herringbone structure in GeTe-based thermoelectric materials

Abstract

Keywords

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