Volume of metallic phase in lightly doped lanthanum manganite single crystals

被引：25

作者：

Mostovshchikova, EV ^{[1
]}

Bebenin, NG ^{[1
]}

Loshkareva, NN ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1103/PhysRevB.70.012406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The absorption spectra, temperature dependence of light transmission, and dc resistivity of La0.92Ca0.08MnO3 single crystal are investigated. The volume of the metallic phase in insulating matrix is evaluated by analyzing the temperature dependence of the light absorption and dc conductivity. Using the data published, we also calculate the metallic phase volume in La1-xSrxMnO3, x=0.07 and 0.10. It is shown that in the lightly doped manganites, the metallic droplets lie in the ferromagnetically ordered regions, but only a small part of the ferromagnetic phase has metallic conductivity.

引用

页码：012406 / 1

页数：4

共 22 条

[1] Colossal magnetoresistant materials: The key role of phase separation [J].

Dagotto, E ;

Hotta, T ;

Moreo, A .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153

[2] Phase separation of the spin system in the La0.93Sr0.07MnO3 crystal [J].

Dubunin, SF ;

Arkhipov, VE ;

Teploukhov, SG ;

Parkhomenko, VD ;

Loshkareva, NN ;

Solin, NI .

PHYSICS OF THE SOLID STATE, 2003, 45 (12) :2297-2302

[3] Liquidlike spatial distribution of magnetic droplets revealed by neutron scattering in La1-xCaxMnO3 [J].

Hennion, M ;

Moussa, F ;

Biotteau, G ;

Rodriguez-Carvajal, J ;

Pinsard, L ;

Revcolevschi, A .

PHYSICAL REVIEW LETTERS, 1998, 81 (09) :1957-1960

[4] Inhomogeneous charge distributions and phase separation in manganites [J].

Kagan, MY ;

Kugel, KI .

PHYSICS-USPEKHI, 2001, 44 (06) :553-570

[5] Polaron absorption in a perovskite manganite La0.7Ca0.3MnO3 [J].

Kim, KH ;

Jung, JH ;

Noh, TW .

PHYSICAL REVIEW LETTERS, 1998, 81 (07) :1517-1520

[6] Centers of charge nonuniformity in absorption spectra of lanthanum manganites [J].

Loshkareva, NN ;

Sukhorukov, YP ;

Neifel'd, EA ;

Arkhipov, VE ;

Korolev, AV ;

Gaviko, VS ;

Panfilova, EV ;

Dyakina, VP ;

Mukovskii , YM ;

Shulyatev, DA .

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 2000, 90 (02) :389-396

[7]

Loshkareva NN, 1997, PHYS STATUS SOLIDI A, V164, P863, DOI 10.1002/1521-396X(199712)164:2<863::AID-PSSA863>3.0.CO

[8]

2-7

[9] Direct observation of phase separation in La1-xCaxMnO3 [J].

Loshkareva, NN ;

Sukhorukov, YP ;

Naumov, SV ;

Solin, NI ;

Smolyak, IB ;

Panfilova, EV .

JETP LETTERS, 1998, 68 (01) :97-100

[10] Charge segregation and a nonuniform magnetic state in donor- and acceptor-doped LaMnO3 [J].

Loshkareva, NN ;

Korolev, AV ;

Arbuzova, TI ;

Solin, NI ;

Viglin, NA ;

Smolyak, IB ;

Bebenin, NG ;

Sukhorukov, YP ;

Naumov, SV ;

Kostromitina, NV ;

Balbashov, AM .

PHYSICS OF THE SOLID STATE, 2002, 44 (10) :1916-1924

← 1 2 3 →