Magnetoresistance in double-perovskite structure for sr2femoo6

被引：1

作者：

Koo, Je Huan ^{[1
]}

Kim, Jung-Hyun ^{[1
]}

Geun, Dong ^{[1
]}

Cho, Guangsup ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Electrophys, Seoul 139701, South Korea

来源：

MODERN PHYSICS LETTERS B | 2007年 / 21卷 / 24期

关键词：

double perovskite; magnetoresistance;

D O I：

10.1142/S0217984907014097

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the magnetoresistance in double-perovskite Sr2FeMoO6- In Fe-planes, ferromagnetic phases are obtained via a Kondo lattice model different from conventional ones. In Fe-planes, ferromagnetic states arise by electron electron interactions mediated by phonon-enhanced spin flips different from bare Kondo spin flips. The appreciable magnetoresistance is mainly contributed by electrons in Fe-planes. The ferrimagnetism observed in the material Sr2FeMoO6 is explained through the antiparallel alignment between the ferromagnetic spin alignments in Fe-planes and those in Mo-planes which are also driven by our theory, and the difference in magnitude of spin in Mo-planes and Fe-planes.

引用

页码：1593 / 1598

页数：6

共 8 条

[1] Metal-insulator transitions [J].

Imada, M ;

Fujimori, A ;

Tokura, Y .

REVIEWS OF MODERN PHYSICS, 1998, 70 (04) :1039-1263

[2] FERROMAGNETISM IN DILUTE ALLOYS [J].

KIM, DJ .

PHYSICAL REVIEW, 1966, 149 (02) :434-+

[3] Room-temperature magnetoresistance in an oxide material with an ordered double-perovskite structure [J].

Kobayashi, KL ;

Kimura, T ;

Sawada, H ;

Terakura, K ;

Tokura, Y .

NATURE, 1998, 395 (6703) :677-680

[4]

Kondo J., 1970, Solid State Physics, V23, P183

[5] Model of high-Tc superconductivity driven by the intrinsic Kondo-type interaction:: Effective phonon scheme [J].

Koo, JH ;

Kim, JJ .

PHYSICAL REVIEW B, 2000, 61 (06) :4289-4297

[6] PEIERLS INSTABILITY IN HEISENBERG CHAINS [J].

PYTTE, E .

PHYSICAL REVIEW B, 1974, 10 (11) :4637-4642

[7] Electronic and magnetic structures of Sr2FeMOO6 -: art. no. 097204 [J].

Ray, S ;

Kumar, A ;

Sarma, DD ;

Cimino, R ;

Turchini, S ;

Zennaro, S ;

Zema, N .

PHYSICAL REVIEW LETTERS, 2001, 87 (09) :art. no.-097204

[8] Structural and magnetic properties of double perovskites AA′FeMoO6 (AA′ = Ba2, BaSr, Sr2 and Ca2) [J].

Ritter, C ;

Ibarra, MR ;

Morellon, L ;

Blasco, J ;

García, J ;

De Teresa, JM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (38) :8295-8308

← 1 →