Crystal structure of (Ba1-xLax) [Mg(1+x)/3Nb(2-x)/3]O3 ceramics

Jong Hoo Paik; Sahn Nahm; Young Sik Kim; Hyun Min Park; Hwack Joo Lee; Jae Dong Byun

doi:10.1023/A:1021822614373

Crystal structure of (Ba_1-xLa_x) [Mg_(1+x)/3Nb_(2-x)/3]O₃ ceramics

Jong Hoo Paik, Sahn Nahm, Young Sik Kim, Hyun Min Park, Hwack Joo Lee, Jae Dong Byun

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

5 Citations (Scopus)

Abstract

The crystal structure of (Ba_1-xLa_x)[Mg_(1+x)/3Nb_(2-x)/3]O₃ (BLMN) ceramics with 0 ≤ × ≤ 1 was investigated using X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When the La content, x, was above 0.1, the 1:2 ordered hexagonal structure found in Ba(Mg_1/3Nb_2/3)O₃ (BMN) was transformed into the 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x = 0.7. When x exceeded 0.7, however, BLMN exhibited a 1:1 ordered monoclinic structure, rather than a 1:1 ordered cubic structure. La(Mg_2/3Nb_1/3)O₃ (LMN) has a 1:1 ordered monoclinic P2₁/n structure with a = 5.6004 Å, b = 5.6414 Å, c = 7.9346 Å, and β = 89.9819°. The monoclinic LMN has the in-phase and the anti-phase tilt of oxygen octahedra. The anti-parallel shift of A-site cations was also found in LMN.

Original language	English
Pages (from-to)	621-628
Number of pages	8
Journal	Journal of Materials Science
Volume	38
Issue number	3
DOIs	https://doi.org/10.1023/A:1021822614373
Publication status	Published - 2003 Feb 1

Bibliographical note

Funding Information:
This work was supported by the Ministry of Information and Communication.

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1023/A:1021822614373

Cite this

@article{a81da18dcf404ebb8c6ab1f21f034eac,

title = "Crystal structure of (Ba1-xLax) [Mg(1+x)/3Nb(2-x)/3]O3 ceramics",

abstract = "The crystal structure of (Ba1-xLax)[Mg(1+x)/3Nb(2-x)/3]O 3 (BLMN) ceramics with 0 ≤ × ≤ 1 was investigated using X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When the La content, x, was above 0.1, the 1:2 ordered hexagonal structure found in Ba(Mg1/3Nb2/3)O3 (BMN) was transformed into the 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x = 0.7. When x exceeded 0.7, however, BLMN exhibited a 1:1 ordered monoclinic structure, rather than a 1:1 ordered cubic structure. La(Mg2/3Nb1/3)O3 (LMN) has a 1:1 ordered monoclinic P21/n structure with a = 5.6004 {\AA}, b = 5.6414 {\AA}, c = 7.9346 {\AA}, and β = 89.9819°. The monoclinic LMN has the in-phase and the anti-phase tilt of oxygen octahedra. The anti-parallel shift of A-site cations was also found in LMN.",

author = "Paik, {Jong Hoo} and Sahn Nahm and Kim, {Young Sik} and Park, {Hyun Min} and Lee, {Hwack Joo} and Byun, {Jae Dong}",

note = "Funding Information: This work was supported by the Ministry of Information and Communication.",

year = "2003",

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doi = "10.1023/A:1021822614373",

language = "English",

volume = "38",

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T1 - Crystal structure of (Ba1-xLax) [Mg(1+x)/3Nb(2-x)/3]O3 ceramics

AU - Paik, Jong Hoo

AU - Nahm, Sahn

AU - Kim, Young Sik

AU - Park, Hyun Min

AU - Lee, Hwack Joo

AU - Byun, Jae Dong

N1 - Funding Information: This work was supported by the Ministry of Information and Communication.

PY - 2003/2/1

Y1 - 2003/2/1

N2 - The crystal structure of (Ba1-xLax)[Mg(1+x)/3Nb(2-x)/3]O 3 (BLMN) ceramics with 0 ≤ × ≤ 1 was investigated using X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When the La content, x, was above 0.1, the 1:2 ordered hexagonal structure found in Ba(Mg1/3Nb2/3)O3 (BMN) was transformed into the 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x = 0.7. When x exceeded 0.7, however, BLMN exhibited a 1:1 ordered monoclinic structure, rather than a 1:1 ordered cubic structure. La(Mg2/3Nb1/3)O3 (LMN) has a 1:1 ordered monoclinic P21/n structure with a = 5.6004 Å, b = 5.6414 Å, c = 7.9346 Å, and β = 89.9819°. The monoclinic LMN has the in-phase and the anti-phase tilt of oxygen octahedra. The anti-parallel shift of A-site cations was also found in LMN.

AB - The crystal structure of (Ba1-xLax)[Mg(1+x)/3Nb(2-x)/3]O 3 (BLMN) ceramics with 0 ≤ × ≤ 1 was investigated using X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). When the La content, x, was above 0.1, the 1:2 ordered hexagonal structure found in Ba(Mg1/3Nb2/3)O3 (BMN) was transformed into the 1:1 ordered cubic structure. The 1:1 ordered cubic structure was maintained up to x = 0.7. When x exceeded 0.7, however, BLMN exhibited a 1:1 ordered monoclinic structure, rather than a 1:1 ordered cubic structure. La(Mg2/3Nb1/3)O3 (LMN) has a 1:1 ordered monoclinic P21/n structure with a = 5.6004 Å, b = 5.6414 Å, c = 7.9346 Å, and β = 89.9819°. The monoclinic LMN has the in-phase and the anti-phase tilt of oxygen octahedra. The anti-parallel shift of A-site cations was also found in LMN.

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