Computational nano-materials design for colossal thermoelectric-cooling power by adiabatic spin-entropy expansion in nano-superstructures

被引：21

作者：

Katayama-Yoshida, Hiroshi ^{[1
]}

Fukushima, Tetsuya ^{[1
]}

Dinh, Van An ^{[1
]}

Sato, Kazunori ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2007年 / 46卷 / 33-35期

关键词：

spin-entropy current; thermoelectric power; Peltier effect; CPP-GMR; Konbu-phase; half-Heusler ferromagnets; spin caloritronics; spinodal nano-decomposition; computational nano-materials design;

D O I：

10.1143/JJAP.46.L777

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In addition to the conventional Peltier effect, we propose a new class of thermoelectric-cooling mechanism based on the adiabatic spin-entropy expansion in a quasi-one-dimensional nano-superstructure by injecting the spin current from the ferromagnetic metal to paramagnetic one. The spin-entropy expansion mechanism dominates and enhances the thermoelectric-cooling power dramatically in current perpendicular to plane-giant magneto-resistance (CPP-GMR) Co/Au nano-interface. Based upon the spin-entropy expansion mechanism, we design the new thermoelectric-cooling nano-superstructures using the newly designed half-Heusler ferromagnets NiMnSi (T-C = 1050 K) and self-organized quasi-one-dimensional Konbu-phase (Zn,Cr)Te with very high blocking temperature (> 1000 K) by spinodal nano-decomposition.

引用

页码：L777 / L779

页数：3

共 13 条

[1] Spin-polarized current switching of a Co thin film nanomagnet [J].

Albert, FJ ;

Katine, JA ;

Buhrman, RA ;

Ralph, DC .

APPLIED PHYSICS LETTERS, 2000, 77 (23) :3809-3811

[2]

DINH VA, UNPUB J PHYS SOC JPN

[3] SiGeC/Si superlattice microcoolers [J].

Fan, XF ;

Zeng, GH ;

LaBounty, C ;

Bowers, JE ;

Croke, E ;

Ahn, CC ;

Huxtable, S ;

Majumdar, A ;

Shakouri, A .

APPLIED PHYSICS LETTERS, 2001, 78 (11) :1580-1582

[4] Peltier effect in sub-micron-size metallic junctions [J].

Fukushima, A ;

Yagami, K ;

Tulapurkar, AA ;

Suzuki, Y ;

Kubota, H ;

Yamamoto, A ;

Yuasa, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2005, 44 (1-7) :L12-L14

[5] Theoretical prediction of curie temperature in (Zn,Cr)S, (Zn,Cr)Se and (Zn,Cr)Te by first principles calculations [J].

Fukushima, T ;

Sato, K ;

Katayama-Yoshida, H ;

Dederichs, PH .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2004, 43 (11A) :L1416-L1418

[6] Spinodal decomposition under layer by layer growth condition and high curie temperature quasi-one-dimensional nano-structure in dilute magnetic semiconductors [J].

Fukushima, Tetsuya ;

Sato, Kazunori ;

Katayama-Yoshida, Hiroshi ;

Dederichs, Peter H. .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2006, 45 (12-16) :L416-L418

[7] Theory of ferromagnetic semiconductors [J].

Katayama-Yoshida, H. ;

Sato, K. ;

Fukushima, T. ;

Toyoda, M. ;

Kizaki, H. ;

Dinh, V. A. ;

Dederichs, P. H. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2007, 204 (01) :15-32

[8] Computational nano-materials design for high-TC ferromagnetism in wide-gap magnetic semiconductors [J].

Katayama-Yoshida, H. ;

Sato, K. ;

Fukushima, T. ;

Toyoda, M. ;

Kizaki, H. ;

Dinh, V. A. ;

Dederichs, P. H. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) :2070-2077

[9] Microwave oscillations of a nanomagnet driven by a spin-polarized current [J].

Kiselev, SI ;

Sankey, JC ;

Krivorotov, IN ;

Emley, NC ;

Schoelkopf, RJ ;

Buhrman, RA ;

Ralph, DC .

NATURE, 2003, 425 (6956) :380-383

[10] Time-resolved reversal of spin-transfer switching in a nanomagnet [J].

Koch, RH ;

Katine, JA ;

Sun, JZ .

PHYSICAL REVIEW LETTERS, 2004, 92 (08)

← 1 2 →