Anomalous Jahn-Teller distortions in La0.75Ca0.25MnO3 system: An X-ray absorption study

被引：2

作者：

Brunelli, M ^{[1
]}

Lanzara, A ^{[1
]}

Saini, NL ^{[1
]}

Bianconi, A ^{[1
]}

Valletta, A ^{[1
]}

Radaelli, PG ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38043 GRENOBLE,FRANCE

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1997年 / 10卷 / 04期

关键词：

Jahn-Teller effect; La0.75Ca0.25MnO3; giant magnetoresistance;

D O I：

10.1007/BF02765710

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Mn K-edge X-ray absorption near edge structure (XANES) measurements have been made to study the temperature-dependent lattice effects in the La0.75Ca0.25MnO3 system. The high-resolution XANES spectra recorded with high signal-to-noise ratio have allowed us to study the temperature dependence of the Jahn-Teller splitting indicated directly by the dipole forbidden pre-peaks corresponding to transition in Mn 3d states. The results show splitting of the e(g) state in its two orbitals (d(x2-y2) and d(3z2-r2)). The energy splitting shows anomalous temperature dependence across the giant magnetoresistance transition temperature.

引用

页码：315 / 318

页数：4

共 20 条

[1] Stripe structure of the CuO2 plane in Bi2Sr2CaCu2O8+y by anomalous x-ray diffraction [J].

Bianconi, A ;

Lusignoli, M ;

Saini, NL ;

Bordet, P ;

Kvick, A ;

Radaelli, PG .

PHYSICAL REVIEW B, 1996, 54 (06) :4310-4314

[2] Determination of the local lattice distortions in the CuO2 plane of La1.85Sr0.15CuO4 [J].

Bianconi, A ;

Saini, NL ;

Lanzara, A ;

Missori, M ;

Rossetti, T ;

Oyanagi, H ;

Yamaguchi, H ;

Oka, K ;

Ito, T .

PHYSICAL REVIEW LETTERS, 1996, 76 (18) :3412-3415

[3] Stripe structure in the CuO2 plane of perovskite superconductors [J].

Bianconi, A ;

Saini, NL ;

Rossetti, T ;

Lanzara, A ;

Perali, A ;

Missori, M ;

Oyanagi, H ;

Yamaguchi, H ;

Nishihara, Y ;

Ha, DH .

PHYSICAL REVIEW B, 1996, 54 (17) :12018-12021

[4]

Bianconi A., 1988, XRAY ABSORPTION PRIN, P573

[5] Commensurate to incommensurate charge ordering and its real-space images in La0.5Ca0.5MnO3 [J].

Chen, CH ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1996, 76 (21) :4042-4045

[6] LATTICE EFFECTS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

EGAMI, T ;

BILLINGE, SJL .

PROGRESS IN MATERIALS SCIENCE, 1994, 38 :359-424

[7]

GARCIAMUNOZ JL, 1996, PHYS REV B, V55, P34

[8] THEORY OF THE ROLE OF COVALENCE IN THE PEROVSKITE-TYPE MANGANITES [LA,M(II)]MNO3 [J].

GOODENOUGH, JB .

PHYSICAL REVIEW, 1955, 100 (02) :564-573

[9] Condensed-matter physics - New forms of phase segregation [J].

Goodenough, JB ;

Zhou, JS .

NATURE, 1997, 386 (6622) :229-230

[10] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

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