Magnetoimpedance spectroscopy of epitaxial multiferroic thin films
| dc.contributor.author | Schmidt, Rainer | |
| dc.contributor.author | Ventura, Jofre | |
| dc.contributor.author | Langenberg, Eric | |
| dc.contributor.author | Nemes, Norbert Marcel | |
| dc.contributor.author | Munuera, Carmen | |
| dc.contributor.author | Varela, Manuel | |
| dc.contributor.author | García-Hernández, Mar | |
| dc.contributor.author | León Yebra, Carlos | |
| dc.contributor.author | Santamaría Sánchez-Barriga, Jacobo | |
| dc.date.accessioned | 2023-06-20T03:50:42Z | |
| dc.date.available | 2023-06-20T03:50:42Z | |
| dc.date.issued | 2012-07 | |
| dc.description | © 2012 American Physical Society. The authors acknowledge financial support from the Spanish Ministerio de Ciencia e Innovación (MICINN) under Grants No. MAT2008-06761-C03, No. MAT2011-29269-C03, No. MAT2011-27470-C02, No. IMAGINE CSD2009-00013, No. CONSOLIDER INGENIO CSD2009-00013, Contract No. NANOSELECT CSD2007-00041, and from the Comunidad de Madrid through S2009-MAT1756 (PHAMA). R.S. and N.M.N. acknowledge the Ramón y Cajal program from the MICINN. Many thanks go to SSSS Ltd. for support with the data analysis. | |
| dc.description.abstract | The detection of true magnetocapacitance (MC) as a manifestation of magnetoelectric coupling (MEC) in multiferroic materials is a nontrivial task, because pure magnetoresistance (MR) of an extrinsic Maxwell-Wagner-type dielectric relaxation can lead to changes in capacitance [G. Catalan, Appl. Phys. Lett. 88, 102902 (2006)]. In order to clarify such difficulties involved with dielectric spectroscopy on multiferroic materials, we have simulated the dielectric permittivity ε' of two dielectric relaxations in terms of a series of one intrinsic film-type and one extrinsic Maxwell-Wagner-type relaxation. Such a series of two relaxations was represented in the frequency- (f -) and temperature- (T -) dependent notations ε' vs f and ε' vs T by a circuit model consisting in a series of two ideal resistor-capacitor (RC) elements. Such simulations enabled rationalizing experimental f -, T-, and magnetic field- (H-) dependent dielectric spectroscopy data from multiferroic epitaxial thin films of BiMnO3 (BMO) and BiFeO3 (BFO) grown on Nb-doped SrTiO3. Concomitantly, the deconvolution of intrinsic film and extrinsic Maxwell-Wagner relaxations in BMO and BFO films was achieved by fitting f -dependent dielectric data to an adequate equivalent circuit model. Analysis of the H-dependent data in the form of determining the H-dependent values of the equivalent circuit resistors and capacitors then yielded the deconvoluted MC and MR values for the separated intrinsic dielectric relaxations in BMO and BFO thin films. Substantial intrinsic MR effects up to 65% in BMO films below the magnetic transition (TC ≈ 100 K) and perceptible intrinsic MEC up to −1.5% near TC were identified unambiguously. | |
| dc.description.department | Depto. de Estructura de la Materia, Física Térmica y Electrónica | |
| dc.description.faculty | Fac. de Ciencias Físicas | |
| dc.description.refereed | TRUE | |
| dc.description.sponsorship | Spanish Ministerio de Ciencia e Innovación (MICINN) | |
| dc.description.sponsorship | Comunidad de Madrid | |
| dc.description.status | pub | |
| dc.eprint.id | https://eprints.ucm.es/id/eprint/30045 | |
| dc.identifier.doi | 10.1103/PhysRevB.86.035113 | |
| dc.identifier.issn | 1098-0121 | |
| dc.identifier.officialurl | http://dx.doi.org/10.1103/PhysRevB.86.035113 | |
| dc.identifier.relatedurl | http://journals.aps.org/ | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14352/44544 | |
| dc.issue.number | 3 | |
| dc.journal.title | Physical review B | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.relation.projectID | MAT2008-06761-C03 | |
| dc.relation.projectID | MAT2011-29269-C03 | |
| dc.relation.projectID | MAT2011-27470-C02 | |
| dc.relation.projectID | IMAGINE CSD2009-00013 | |
| dc.relation.projectID | CONSOLIDER INGENIO CSD2009-00013 | |
| dc.relation.projectID | NANOSELECT CSD2007-00041 | |
| dc.relation.projectID | S2009-MAT1756 (PHAMA) | |
| dc.rights.accessRights | open access | |
| dc.subject.cdu | 537 | |
| dc.subject.keyword | Heterostructures | |
| dc.subject.keyword | Nanostructures | |
| dc.subject.keyword | Dynamics. | |
| dc.subject.ucm | Electricidad | |
| dc.subject.ucm | Electrónica (Física) | |
| dc.subject.unesco | 2202.03 Electricidad | |
| dc.title | Magnetoimpedance spectroscopy of epitaxial multiferroic thin films | |
| dc.type | journal article | |
| dc.volume.number | 86 | |
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