Thermoelectric properties of Heusler-type off-stoichiometric Fe2V1+xAl1-x alloys

被引：67

作者：

Miyazaki, Hidetoshi ^{[1
]}

Tanaka, Suguru ^{[2
]}

Ide, Naoki ^{[2
]}

Soda, Kazuo ^{[3
]}

Nishino, Yoichi ^{[2
]}

机构：

[1] Nagoya Inst Technol, Ctr Fostering Young & Innovat Researchers, Nagoya, Aichi 4668555, Japan

[2] Nagoya Inst Technol, Dept Frontier Mat, Nagoya, Aichi 4668555, Japan

[3] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

来源：

MATERIALS RESEARCH EXPRESS | 2014年 / 1卷 / 01期

关键词：

thermoelectric material; Heusler alloy; Fe2VAl; off-stoichiometric effect; ELECTRONIC-STRUCTURE; TRANSPORT; BEAMLINE;

D O I：

10.1088/2053-1591/1/1/015901

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the thermoelectric properties of Heusler-type off-stoichiometric Fe2V1+xAl1-x alloys. Due to the off-stoichiometric effect, which is the substitution of V/Al atoms with Al/V atoms, semiconductor-like electric resistivity behavior in Fe2VAl is changed to metallic behavior in Fe2V1+xAl1-x alloys and both positive and negative absolute Seebeck coefficients are drastically increased. The maximum thermoelectric power factor of Fe2V1+xAl1-x alloys is 4.3 x 10(-3) (x = -0.03: p-type) and 6.8 x 10(-3)WmK(-2) (x = 0.05: n-type) with a peak temperature in the range 300-600 K, exceeding the values of previously reported Fe-based Heusler alloys as well as those of available thermoelectric materials such as Bi-Te semiconductors. Based on x-ray diffraction and photoemission spectroscopy results, it is thought that the maintenance of the Heusler-type (L2(1)) crystal structure and the modification of the electronic structure due to the off-stoichiometry could explain the large thermoelectric power factor and high peak temperature in Fe2V1+xAl1-x alloys.

引用

页数：9

共 30 条

[1] Electronic structure and magnetism of Fe3-xVxX (X=Si, Ga, and Al) alloys by the KKR-CPA method [J].

Bansil, A ;

Kaprzyk, S ;

Mijnarends, PE ;

Tobola, J .

PHYSICAL REVIEW B, 1999, 60 (19) :13396-13412

[2] Microstructural evolution and stability of (Fe1-xVx)3Al alloys in relation to the electronic structure. [J].

Botton, GA ;

Nishino, Y ;

Humphreys, CJ .

INTERMETALLICS, 2000, 8 (9-11) :1209-1214

[3] ATOMIC SCREENING CONSTANTS FROM SCF FUNCTIONS [J].

CLEMENTI, E ;

RAIMONDI, DL .

JOURNAL OF CHEMICAL PHYSICS, 1963, 38 (11) :2686-&

[4] Effect of onsite Coulomb repulsion on thermoelectric properties of full-Heusler compounds with pseudogaps [J].

Do, Dat ;

Lee, Mal-Soon ;

Mahanti, S. D. .

PHYSICAL REVIEW B, 2011, 84 (12)

[5] Physical properties of Heusler-like Fe2VAl -: art. no. 165109 [J].

Feng, Y ;

Rhee, JY ;

Wiener, TA ;

Lynch, DW ;

Hubbard, BE ;

Sievers, AJ ;

Schlagel, DL ;

Lograsso, TA ;

Miller, LL .

PHYSICAL REVIEW B, 2001, 63 (16)

[6] Electronic structure of possible 3d 'heavy-fermion' compound Fe2VAl [J].

Guo, GY ;

Botton, GA ;

Nishino, Y .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1998, 10 (08) :L119-L126

[7] Seebeck coefficient of (Fe,V)3Al alloys [J].

Hanada, Y ;

Suzuki, RO ;

Ono, K .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 329 (1-2) :63-68

[8] Effect of silicon substitution on thermoelectric properties of Heusler-type Fe2VAl alloy [J].

Kato, H ;

Kato, M ;

Nishino, Y ;

Mizutani, U ;

Asano, S .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2001, 65 (07) :652-656

[9] Thermoelectric properties of quaternary heusler alloys Fe2VAl1-xSix [J].

Lue, C. S. ;

Chen, C. F. ;

Lin, J. Y. ;

Yu, Y. T. ;

Kuo, Y. K. .

PHYSICAL REVIEW B, 2007, 75 (06)

[10]

Lue CS, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.085121

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