In situ transmission electron microscopy observation of multiple phase transition in BaGd2Mn2O7

被引：0

作者：

Nakano, Hiromi ^{[1
]}

Ishizawa, Nobuo

Kamegashira, Naoki

Yashima, Masatomo

机构：

[1] Ryukoku Univ, Electron Microscope Lab, Otsu, Shiga 5202194, Japan

[2] Nagoya Inst Technol, Ceram Res Lab, Tajimi 5070071, Japan

[3] Toyohashi Univ Technol, Dept Mat Sci, Toyohashi, Aichi 4418580, Japan

[4] Tokyo Inst Technol, Dept Mat Sci & Engn, Yokohama, Kanagawa 2268502, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 04期

关键词：

D O I：

10.1111/j.1551-2916.2006.01314.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In situ transmission electron microscopy observation revealed that BaGd2Mn2O7 undergoes several phase transitions upon heating. The orthorhombic Pnnm phase (I) at room temperature was transformed into a tetragonal P4(2)/mnm (II) at around 420 K via an intermediate phase. On further heating, the other phase (III) nucleated in the phase II matrix at 623 K and grew until covering the whole inspected region by 723 K. Phase III has a 1.5% lattice mismatch along c compared with phase II, and presumably has a monoclinic symmetry. The transition between II and III was of the first order.

引用

页码：1342 / 1345

页数：4

共 18 条

[1] OCTAHEDRAL TILT PHASES IN PEROVSKITE-LIKE CRYSTALS WITH SLABS CONTAINING AN EVEN NUMBER OF OCTAHEDRAL LAYERS [J].

ALEKSANDROV, KS ;

BARTOLOME, J .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1994, 6 (40) :8219-8235

[2] CRYSTALLOGRAPHIC DATA ON A NEW SERIES OF MIXED (RARE-EARTH AND ALKALINE-EARTH) MANGANITES [J].

CHERUY, MND .

JOURNAL OF SOLID STATE CHEMISTRY, 1981, 40 (01) :14-19

[3]

ISHIZAWA N, 1996, CERAMICS, V31, P409

[4] SYNTHESIS AND PHASE-TRANSITION OF THE ORTHORHOMBIC BAGD2MN2O7 PHASE [J].

KAMEGASHIRA, N ;

SHIMONO, A ;

HORIKAWA, M .

MATERIALS CHEMISTRY AND PHYSICS, 1990, 24 (04) :389-397

[5] Study on the phase behavior of BaEu2Mn2O7 through heat treatment of a single crystal [J].

Kamegashira, N ;

Meng, J ;

Fujita, K ;

Satoh, H ;

Shishido, T ;

Nakajima, K .

JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 408 :603-607

[6]

Kamegashira N, 2004, J RARE EARTH, V22, P582

[7] Structural determination of a new phase of monoclinic BaTb2Mn2O7 [J].

Kamegashira, N ;

Satoh, H ;

Meng, J ;

Mikami, T .

JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 374 (1-2) :173-176

[8] Growth and structure analysis of single crystal of tetragonal BaGd2Mn2O7 with a superlattice structure [J].

Kamegashira, N ;

Meng, J ;

Mori, T ;

Murase, A ;

Satoh, H ;

Shishido, T ;

Fukuda, T .

MATERIALS LETTERS, 2003, 57 (13-14) :1941-1944

[9]

KAMEGASHIRA N, 2002, 10 INT CER C A, P181

[10]

KAMEGASHIRA N, 1989, SHOKUBAI, V31, P222

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