Control of epitaxial growth orientation and anisotropic thermoelectric properties of misfit-type Ca3Co4O9 thin films

被引：38

作者：

Sakai, A ^{[1
]}

Kanno, T ^{[1
]}

Yotsuhashi, S ^{[1
]}

Odagawa, A ^{[1
]}

Adachi, H ^{[1
]}

机构：

[1] Mitsushita Elect Ind Co Ltd, Adv Technol Res Labs, Kyoto 6190237, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2005年 / 44卷 / 28-32期

关键词：

thermoelectric; Ca3Co4O9; anisotropic; epitaxial control; Seebeck;

D O I：

10.1143/JJAP.44.L966

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the control of crystal orientation in misfit-type layered cobaltite Ca3Co4O9 thin films by rf-planar magnetron sputtering and succeeded in growing epitaxial films with c-axis, a-axis and b-axis orientations normal to the substrate. Anisotropic transport properties (parallel to the CoO2 layers and perpendicular to the CoO2 layers) were measured using the b-axis-oriented epitaxial films with a layered structure perpendicular to the substrate surface. The resistivity parallel to the CoO2 layers (rho(a)) is about 8 m Omega cm at room temperature while that perpendicular to the CoO2 layers (rho(c)) is about 300 m Omega cm; the anisotropy is estimated to be about 40. Thermoelectric anisotropy is not considerably pronounced; the parallel Seebeck coefficient S-a is measured to be 110 mu V/K and the perpendicular S-c is 40 mu V/K at room temperature.

引用

页码：L966 / L969

页数：4

共 15 条

[1] Influence of pulsed laser deposition growth conditions on the thermoelectric properties of Ca3Co4O9 thin films -: art. no. 013706 [J].

Eng, HW ;

Prellier, W ;

Hébert, S ;

Grebille, D ;

Méchin, L ;

Mercey, B .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (01)

[2] An oxide single crystal with high thermoelectric performance in air [J].

Funahashi, R ;

Matsubara, I ;

Ikuta, H ;

Takeuchi, T ;

Mizutani, U ;

Sodeoka, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2000, 39 (11B) :L1127-L1129

[3] Thermoelectric properties of Bi2.3-xPbxSr2.6Co2Oy single crystals [J].

Itoh, T ;

Terasaki, I .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2000, 39 (12A) :6658-6660

[4] Anisotropic thermoelectric properties in layered cobaltite AxCoO2 (A=Sr and Ca) thin films [J].

Kanno, T ;

Yotsuhashi, S ;

Adachi, H .

APPLIED PHYSICS LETTERS, 2004, 85 (05) :739-741

[5] Thermopower in cobalt oxides [J].

Koshibae, W ;

Tsutsui, K ;

Maekawa, S .

PHYSICAL REVIEW B, 2000, 62 (11) :6869-6872

[6] Misfit-layered cobaltite with an anisotropic giant magnetoresistance:: Ca3Co4O9 [J].

Masset, AC ;

Michel, C ;

Maignan, A ;

Hervieu, M ;

Toulemonde, O ;

Studer, F ;

Raveau, B ;

Hejtmanek, J .

PHYSICAL REVIEW B, 2000, 62 (01) :166-175

[7] Rapid synthesis and characterization of (Ca1-xBax)3Co4O9 thin films using combinatorial methods [J].

Minami, H ;

Itaka, K ;

Kawaji, H ;

Wang, QJ ;

Koinuma, H ;

Lippmaa, M .

APPLIED SURFACE SCIENCE, 2002, 197 :442-447

[8] Modulated structure of the thermoelectric compound [Ca2CoO3]0.62CoO2 [J].

Miyazaki, Y ;

Onoda, M ;

Oku, T ;

Kikuchi, M ;

Ishii, Y ;

Ono, Y ;

Morii, Y ;

Kajitani, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 (02) :491-497

[9] Large thermoelectric response of metallic perovskites:: Sr1-xLaxTiO3 (0≤x≤0.1) -: art. no. 113104 [J].

Okuda, T ;

Nakanishi, K ;

Miyasaka, S ;

Tokura, Y .

PHYSICAL REVIEW B, 2001, 63 (11)

[10] Synthesis and thermoelectric properties of magnetically c-axis-oriented [Ca2CoO3-δ]0.62CoO2 bulk with various oxygen contents [J].

Sano, M ;

Horii, S ;

Matsubara, I ;

Funahashi, R ;

Shikano, M ;

Shimoyama, J ;

Kishio, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2003, 42 (2B) :L198-L200

← 1 2 →