Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

被引：130

作者：

Stahn, J ^{[1
]}

Chakhalian, J

Niedermayer, C

Hoppler, J

Gutberlet, T

Voigt, J

Treubel, F

Habermeier, HU

Cristiani, G

Keimer, B

Bernhard, C

机构：

[1] Swiss Fed Inst Technol, Lab Neutronenstreuung, Villigen, Switzerland

[2] PSI, Villigen, Switzerland

[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[4] Univ Konstanz, Fak Phys, D-7750 Constance, Germany

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.71.140509

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multilayers of superconducting/ferromagnetic (SC/FM) YBa2Cu3O7/La2/3Ca1/3MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a "dead" region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.

引用

页数：4

共 26 条

[1]

Anderson P. W., 1997, THEORY SUPERCONDUCTI

[2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[3] Nonhomogeneous magnetic order in superconductor-ferromagnet multilayers [J].

Bergeret, FS ;

Efetov, KB ;

Larkin, AI .

PHYSICAL REVIEW B, 2000, 62 (17) :11872-11878

[4] Induced ferromagnetism due to superconductivity in superconductor-ferromagnet structures [J].

Bergeret, FS ;

Volkov, AF ;

Efetov, KB .

PHYSICAL REVIEW B, 2004, 69 (17) :174504-1

[5] COEXISTENCE OF SUPERCONDUCTIVITY AND MAGNETISM - THEORETICAL PREDICTIONS AND EXPERIMENTAL RESULTS [J].

BULAEVSKII, LN ;

BUZDIN, AI ;

KULIC, ML ;

PANJUKOV, SV .

ADVANCES IN PHYSICS, 1985, 34 (02) :175-261

[6]

Buzdin A. I., 1988, Soviet Physics - JETP, V67, P576

[7] Domain wall superconductivity in ferromagnetic superconductors [J].

Buzdin, AI ;

Mel'nikov, AS .

PHYSICAL REVIEW B, 2003, 67 (02)

[8] Proximity effects in superconducting/magnetic multilayers [J].

Chien, CL ;

Reich, DH .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :83-94

[9] Magnetic exchange coupling in ferromagnet/superconductor/ferromagnet multilayers [J].

de Melo, CARS .

PHYSICAL REVIEW LETTERS, 1997, 79 (10) :1933-1936

[10] Neutron reflectometry as a tool to study magnetism (invited) [J].

Felcher, GP .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :5431-5436

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