Growth and characterization of CaCu3Ti4O12 single Crystals

Hui Eun Kim; Sang Don Yang; Jung Woo Lee; Hyun Min Park; Sang Im Yoo

doi:10.1016/j.jcrysgro.2014.09.013

Growth and characterization of CaCu₃Ti₄O₁₂ single Crystals

Hui Eun Kim
, Sang Don Yang
, Jung Woo Lee
, Hyun Min Park
, Sang Im Yoo

Dept. of Materials Science & Engineering

Seoul National University
Korea Research Institute of Standards and Science

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

32 Scopus citations

Abstract

The CaCu₃Ti₄O₁₂ (CCTO) single crystals could be grown from the melt with the nominal composition of Ca:Cu:Ti=1:59:20 in a platinum (Pt) crucible using a self-flux method. The flux-grown CCTO single crystals have well-developed {100} habit planes, and their compositions are close to the ratio of Ca:Cu:Ti=1:3:4. Interestingly, flux-grown CCTO single crystals exhibited two different back reflection Laue patterns; one exhibited only [100] cubic Laue patterns, and the other showed not only [100] cubic Laue patterns but also the satellite spots related to the twin boundary, implying that twin-free CCTO single crystals can be grown by the self-flux method. Both the dielectric constants and losses of twinned CCTO single crystal are significantly higher than those of untwined CCTO crystal at relatively low frequency regime (<10 kHz), suggesting that the dielectric property is sensitive to the twin boundary.

Original language	English
Article number	22423
Pages (from-to)	60-63
Number of pages	4
Journal	Journal of Crystal Growth
Volume	408
DOIs	https://doi.org/10.1016/j.jcrysgro.2014.09.013
State	Published - 15 Dec 2014

Keywords

Back reflection Laue pattern
CaCuTiO
Colossal dielectric response (CDR)
Dielectric property
Self-flux method
Single crystal

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10.1016/j.jcrysgro.2014.09.013

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@article{86fedb9641d44aa290a29455842d55de,

title = "Growth and characterization of CaCu3Ti4O12 single Crystals",

abstract = "The CaCu3Ti4O12 (CCTO) single crystals could be grown from the melt with the nominal composition of Ca:Cu:Ti=1:59:20 in a platinum (Pt) crucible using a self-flux method. The flux-grown CCTO single crystals have well-developed \{100\} habit planes, and their compositions are close to the ratio of Ca:Cu:Ti=1:3:4. Interestingly, flux-grown CCTO single crystals exhibited two different back reflection Laue patterns; one exhibited only [100] cubic Laue patterns, and the other showed not only [100] cubic Laue patterns but also the satellite spots related to the twin boundary, implying that twin-free CCTO single crystals can be grown by the self-flux method. Both the dielectric constants and losses of twinned CCTO single crystal are significantly higher than those of untwined CCTO crystal at relatively low frequency regime (<10 kHz), suggesting that the dielectric property is sensitive to the twin boundary.",

keywords = "Back reflection Laue pattern, CaCuTiO, Colossal dielectric response (CDR), Dielectric property, Self-flux method, Single crystal",

author = "Kim, \{Hui Eun\} and Yang, \{Sang Don\} and Lee, \{Jung Woo\} and Park, \{Hyun Min\} and Yoo, \{Sang Im\}",

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year = "2014",

month = dec,

day = "15",

doi = "10.1016/j.jcrysgro.2014.09.013",

language = "English",

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pages = "60--63",

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T1 - Growth and characterization of CaCu3Ti4O12 single Crystals

AU - Kim, Hui Eun

AU - Yang, Sang Don

AU - Lee, Jung Woo

AU - Park, Hyun Min

AU - Yoo, Sang Im

PY - 2014/12/15

Y1 - 2014/12/15

N2 - The CaCu3Ti4O12 (CCTO) single crystals could be grown from the melt with the nominal composition of Ca:Cu:Ti=1:59:20 in a platinum (Pt) crucible using a self-flux method. The flux-grown CCTO single crystals have well-developed {100} habit planes, and their compositions are close to the ratio of Ca:Cu:Ti=1:3:4. Interestingly, flux-grown CCTO single crystals exhibited two different back reflection Laue patterns; one exhibited only [100] cubic Laue patterns, and the other showed not only [100] cubic Laue patterns but also the satellite spots related to the twin boundary, implying that twin-free CCTO single crystals can be grown by the self-flux method. Both the dielectric constants and losses of twinned CCTO single crystal are significantly higher than those of untwined CCTO crystal at relatively low frequency regime (<10 kHz), suggesting that the dielectric property is sensitive to the twin boundary.

AB - The CaCu3Ti4O12 (CCTO) single crystals could be grown from the melt with the nominal composition of Ca:Cu:Ti=1:59:20 in a platinum (Pt) crucible using a self-flux method. The flux-grown CCTO single crystals have well-developed {100} habit planes, and their compositions are close to the ratio of Ca:Cu:Ti=1:3:4. Interestingly, flux-grown CCTO single crystals exhibited two different back reflection Laue patterns; one exhibited only [100] cubic Laue patterns, and the other showed not only [100] cubic Laue patterns but also the satellite spots related to the twin boundary, implying that twin-free CCTO single crystals can be grown by the self-flux method. Both the dielectric constants and losses of twinned CCTO single crystal are significantly higher than those of untwined CCTO crystal at relatively low frequency regime (<10 kHz), suggesting that the dielectric property is sensitive to the twin boundary.

KW - Back reflection Laue pattern

KW - CaCuTiO

KW - Colossal dielectric response (CDR)

KW - Dielectric property

KW - Self-flux method

KW - Single crystal

UR - https://www.scopus.com/pages/publications/84955516259

U2 - 10.1016/j.jcrysgro.2014.09.013

DO - 10.1016/j.jcrysgro.2014.09.013

M3 - Article

AN - SCOPUS:84955516259

SN - 0022-0248

VL - 408

SP - 60

EP - 63

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

M1 - 22423

ER -

Growth and characterization of CaCu₃Ti₄O₁₂ single Crystals

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Keywords

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