Ferroelectric substrate effects on the magnetism, magnetotransport, and electroresistance of La0.7Ca0.3MnO3 thin films on BaTiO3

被引：23

作者：

Alberca, A. ^{[1
,3
]}

Munuera, C. ^{[1
,3
]}

Tornos, J. ^{[2
,3
]}

Mompean, F. J. ^{[1
,3
]}

Biskup, N. ^{[1
,2
]}

Ruiz, A. ^{[1
]}

Nemes, N. M. ^{[2
,3
]}

de Andres, A. ^{[1
,3
]}

Leon, C. ^{[2
,3
]}

Santamaria, J. ^{[2
,3
]}

Garcia-Hernandez, M. ^{[1
,3
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, ES-28049 Madrid, Spain

[2] Univ Complutense Madrid, Dept Fis Aplicada 3, GFMC, ES-28040 Madrid, Spain

[3] Univ Complutense Madrid, CSIC, Unidad Asociada, Lab Heteroestruct Con Aplicac Spintron, ES-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 14期

关键词：

STRAIN; PHASE; THICKNESS;

D O I：

10.1103/PhysRevB.86.144416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La0.7Ca0.3MnO3 optimally doped epitaxial films were grown on ferroelectric BaTiO3 substrates. Electronic transport (magnetoresistance and electroresistance) and magnetic properties showed important anomalies in the temperature interval between 60 and 150 K, below the metal-insulator transition. Scanning probe microscopy revealed changes in BaTiO3 surface morphology at those temperatures. La0.7Ca0.3MnO3 thickness is a critical factor: 120-angstrom -thick films showed large anomalies sensitive to electric poling of the BaTiO3, whereas the behavior of 150-angstrom -thick films is closer to that of the reference La0.7Ca0.3MnO3 samples grown on SrTiO3. We propose that, through inhomogenous strain and electric polarization effects, the ferroelectric substrate induces an inhomogenous spin distribution in the magnetic layer. This would imply the coexistence of in-plane and out-of-plane ferromagnetic patches in La0.7Ca0.3MnO3, possibly interspersed with antiferromagnetic regions, as it has recently been theoretically predicted. Substrate poling effects are investigated, and a magnetoelectric coupling is demonstrated.

引用

页数：12

共 39 条

[1] Exotic magnetic anisotropy map in epitaxial La0.7Ca0.3MnO3 films on BaTiO3 [J].

Alberca, A. ;

Nemes, N. M. ;

Mompean, F. J. ;

Biskup, N. ;

de Andres, A. ;

Munuera, C. ;

Tornos, J. ;

Leon, C. ;

Hernando, A. ;

Ferrer, P. ;

Castro, G. R. ;

Santamaria, J. ;

Garcia-Hernandez, M. .

PHYSICAL REVIEW B, 2011, 84 (13)

[2] Structural and magnetic properties of LaFe0.5Cr0.5O3 studied by neutron diffraction, electron diffraction and magnetometry [J].

Azad, AK ;

Mellergård, A ;

Eriksson, SG ;

Ivanov, SA ;

Yunus, SM ;

Lindberg, F ;

Svensson, G ;

Mathieu, R .

MATERIALS RESEARCH BULLETIN, 2005, 40 (10) :1633-1644

[3] Element-specific magnetometry on negatively magnetized NdMnO3+δ -: art. no. 10A503 [J].

Bartolomé, F ;

Herrero-Albillos, J ;

García, LM ;

Bartolomé, J ;

Jaouen, N ;

Rogalev, A .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)

[4] Ultrathin oxide films and interfaces for electronics and spintronics [J].

Bibes, Manuel ;

Villegas, Javier E. ;

Barthelemy, Agnes .

ADVANCES IN PHYSICS, 2011, 60 (01) :5-84

[5] Strain-driven charge-ordered state in La0.67Ca0.33MnO3 -: art. no. 184424 [J].

Biswas, A ;

Rajeswari, M ;

Srivastava, RC ;

Venkatesan, T ;

Greene, RL ;

Lu, Q ;

de Lozanne, AL ;

Millis, AJ .

PHYSICAL REVIEW B, 2001, 63 (18)

[6] Electronic and Magnetic Reconstructions in La0.7Sr0.3MnO3/SrTiO3 Heterostructures: A Case of Enhanced Interlayer Coupling Controlled by the Interface [J].

Bruno, F. Y. ;

Garcia-Barriocanal, J. ;

Varela, M. ;

Nemes, N. M. ;

Thakur, P. ;

Cezar, J. C. ;

Brookes, N. B. ;

Rivera-Calzada, A. ;

Garcia-Hernandez, M. ;

Leon, C. ;

Okamoto, S. ;

Pennycook, S. J. ;

Santamaria, J. .

PHYSICAL REVIEW LETTERS, 2011, 106 (14)

[7] Giant Tunneling Electroresistance Effect Driven by an Electrically Controlled Spin Valve at a Complex Oxide Interface [J].

Burton, J. D. ;

Tsymbal, E. Y. .

PHYSICAL REVIEW LETTERS, 2011, 106 (15)

[8] Prediction of electrically induced magnetic reconstruction at the manganite/ferroelectric interface [J].

Burton, J. D. ;

Tsymbal, E. Y. .

PHYSICAL REVIEW B, 2009, 80 (17)

[9] Nanocomputing by field-coupled nanomagnets [J].

Csaba, G ;

Imre, A ;

Bernstein, GH ;

Porod, W ;

Metlushko, V .

IEEE TRANSACTIONS ON NANOTECHNOLOGY, 2002, 1 (04) :209-213

[10] Giant magnetic anisotropy changes in Sr2CrReO6 thin films on BaTiO3 [J].

Czeschka, F. D. ;

Gepraegs, S. ;

Opel, M. ;

Goennenwein, S. T. B. ;

Gross, R. .

APPLIED PHYSICS LETTERS, 2009, 95 (06)

← 1 2 3 4 →