Effect of high valence metal doping on thermoelectric properties of [Ca2CoO3-δ]0.62CoO2

被引：0

作者：

Fujie, K ^{[1
]}

Horii, S ^{[1
]}

Matsubara, I ^{[1
]}

Shin, W ^{[1
]}

Murayama, N ^{[1
]}

Shimoyama, J ^{[1
]}

Kishio, K ^{[1
]}

机构：

[1] Univ Tokyo, Dept Superconduct, Tokyo 1138656, Japan

来源：

THERMOELECTRIC MATERIALS 2003-RESEARCH AND APPLICATIONS | 2004年 / 793卷

关键词：

D O I：

暂无

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report the synthesis and thermoelectric properties of high valence metal-doped [Ca2Co1-xMxO3-delta](0.62)CoO2 (M = Re, Mo or Nb) compounds. Approximately 10% M-doping for Co sites in block layer was found to be effective for dramatic suppression of oxygen nonstoichiometries. Seebeck coefficients were systematically enhanced with M-doping levels (x), and however, electrical resistivities also increased with x for conventionally sintered bulk samples. On the other hand, magnetic alignment and/or densification were remarkably effective for reduction of the resistivity. In the case of Mo-doped (x = 0.1) sample, a highly c-axis aligned and densified sample showed 1-3 times larger power factor at 1100 K (5.3 muWK(-2)cm(-1)) than the non-doped one. Moreover, these high valence metal doped Ca349 compounds exhibited the oxygen nonstoichiometry suppressed dramatically.

引用

页码：317 / 322

页数：6

共 50 条

[21] Platelet crystals of thermoelectric layered cobaltites; pure and Sr-doped [Ca2CoO3]0.62[CoO2]
Xia, CT
Sugiyama, J
Itahara, H
Tani, T
JOURNAL OF CRYSTAL GROWTH, 2005, 276 (3-4) : 519 - 524
[22] Magnetic correlations in subsystems of the misfit [Ca2CoO3]0.62[CoO2] cobaltate
Ahad, Abdul
Gautam, K.
Dey, K.
Majid, S. S.
Rahman, F.
Sharma, S. K.
Coaquira, J. A. H.
da Silva, Ivan
Welter, E.
Shukla, D. K.
PHYSICAL REVIEW B, 2020, 102 (09)
[23] A common behaviour of thermoelectric layered cobaltites:: incommensurate spin density wave states in [Ca2Co4/3Cu2/3O4]0.62[CoO2] and [Ca2CoO3]0.62[CoO2]
Sugiyama, J
Brewer, JH
Ansaldo, EJ
Itahara, H
Dohmae, K
Xia, C
Seno, Y
Hitti, B
Tani, T
JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (49) : 8619 - 8630
[24] First-order phase transition characteristic of the high temperature metal–semiconductor transition in [Ca2CoO3]0.62[CoO2]
Jinguang Cheng
Yu Sui
Yang Wang
Xianjie Wang
Wenhui Su
Applied Physics A, 2009, 94 : 911 - 916
[25] 59Co NMR study on local magnetic properties of [Ca2CoO3]0.62[CoO2]
Umeshima, Yasuhide
Kurahashi, Youichi
Nanba, Hiroshi
Itoh, Masayuki
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) : E272 - E274
[26] Hidden magnetic transitions in the thermoelectric layered cobaltite [Ca2CoO3]0.62[CoO2] -: art. no. 134423
Sugiyama, J
Brewer, JH
Ansaldo, EJ
Itahara, H
Dohmae, K
Seno, Y
Xia, C
Tani, T
PHYSICAL REVIEW B, 2003, 68 (13)
[27] The effect of pressure on the spin density wave transition in the layered cobaltites [Ca2CoO3]0.62[CoO2] and [Ca2Co4/3Cu2/3O4]0.62[CoO2]
Sugiyama, J
Andreica, D
Itahara, H
Tani, T
SOLID STATE COMMUNICATIONS, 2005, 135 (04) : 263 - 267
[28] Oxygen Nonstoichiometry in (Ca2CoO3)0.62(CoO2): A Combined Experimental and Computational Study
Schrade, Matthias
Casolo, Simone
Graham, Paul J.
Ulrich, Clemens
Li, Sean
Lovvik, Ole-Martin
Finstad, Terje G.
Norby, Truls
JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (33): : 18899 - 18907
[29] First-order phase transition characteristic of the high temperature metal-semiconductor transition in [Ca2CoO3]0.62[CoO2]
Cheng, Jinguang
Sui, Yu
Wang, Yang
Wang, Xianjie
Su, Wenhui
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2009, 94 (04): : 911 - 916
[30] The formation mechanism of a textured ceramic of thermoelectric [Ca2CoO3]0.62[CoO2] on β-Co(OH)2 templates through in situ topotactic conversion
Itahara, H
Seo, WS
Lee, S
Nozaki, H
Tani, T
Koumoto, K
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (17) : 6367 - 6373

← 1 2 3 4 5 →