by Salluzzo, M., Gariglio, S., Stornaiuolo, D., Sessi, V. and Rusponi, S., Piamonteze, C., De Luca, G. M., Minola, M. and Marre, D., Gadaleta, A., Brune, H., Nolting, F., Brookes, N. B. and Ghiringhelli, G.
Abstract:
Possible ferromagnetism induced in otherwise nonmagnetic materials has been motivating intense research in complex oxide heterostructures. Here we show that a confined magnetism is realized at the interface between SrTiO3 and two insulating polar oxides, BiMnO3 and LaAlO3. By using polarization dependent x-ray absorption spectroscopy, we find that in both cases the magnetism can be stabilized by a negative exchange interaction between the electrons transferred to the interface and local magnetic moments. These local magnetic moments are associated with magnetic Ti3+ ions at the interface itself for LaAlO3/SrTiO3 and to Mn3+ ions in the overlayer for BiMnO3/SrTiO3. In LaAlO3/SrTiO3 the induced magnetism is quenched by annealing in oxygen, suggesting a decisive role of oxygen vacancies in this phenomenon.
Reference:
Origin of Interface Magnetism in BiMnO3/SrTiO3 and LaAlO3/SrTiO3 Heterostructures (Salluzzo, M., Gariglio, S., Stornaiuolo, D., Sessi, V. and Rusponi, S., Piamonteze, C., De Luca, G. M., Minola, M. and Marre, D., Gadaleta, A., Brune, H., Nolting, F., Brookes, N. B. and Ghiringhelli, G.), In PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, volume 111, 2013.
Bibtex Entry:
@article{ ISI:000323490300010, Author = {Salluzzo, M. and Gariglio, S. and Stornaiuolo, D. and Sessi, V. and Rusponi, S. and Piamonteze, C. and De Luca, G. M. and Minola, M. and Marre, D. and Gadaleta, A. and Brune, H. and Nolting, F. and Brookes, N. B. and Ghiringhelli, G.}, Title = {{Origin of Interface Magnetism in BiMnO3/SrTiO3 and LaAlO3/SrTiO3 Heterostructures}}, Journal = {{PHYSICAL REVIEW LETTERS}}, Year = {{2013}}, Volume = {{111}}, Number = {{8}}, Month = {{AUG 22}}, Abstract = {{Possible ferromagnetism induced in otherwise nonmagnetic materials has been motivating intense research in complex oxide heterostructures. Here we show that a confined magnetism is realized at the interface between SrTiO3 and two insulating polar oxides, BiMnO3 and LaAlO3. By using polarization dependent x-ray absorption spectroscopy, we find that in both cases the magnetism can be stabilized by a negative exchange interaction between the electrons transferred to the interface and local magnetic moments. These local magnetic moments are associated with magnetic Ti3+ ions at the interface itself for LaAlO3/SrTiO3 and to Mn3+ ions in the overlayer for BiMnO3/SrTiO3. In LaAlO3/SrTiO3 the induced magnetism is quenched by annealing in oxygen, suggesting a decisive role of oxygen vacancies in this phenomenon.}}, Publisher = {{AMER PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Salluzzo, M (Corresponding Author), CNR SPIN, Complesso MonteSantangelo Via Cinthia, I-80126 Naples, Italy. Salluzzo, M.; De Luca, G. M., CNR SPIN, I-80126 Naples, Italy. Gariglio, S.; Stornaiuolo, D., Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland. Sessi, V.; Brookes, N. B., European Synchrotron Radiat Facil, F-38043 Grenoble, France. Rusponi, S.; Brune, H., Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland. Piamonteze, C.; Nolting, F., Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland. Minola, M.; Ghiringhelli, G., CNR SPIN, I-20133 Milan, Italy. Minola, M.; Ghiringhelli, G., Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy. Marre, D.; Gadaleta, A., CNR SPIN, I-14146 Genoa, Italy. Marre, D.; Gadaleta, A., Univ Genoa, Dipartimento Fis, I-14146 Genoa, Italy.}}, DOI = {{10.1103/PhysRevLett.111.087204}}, Article-Number = {{087204}}, ISSN = {{0031-9007}}, EISSN = {{1079-7114}}, Keywords-Plus = {{FERROMAGNETISM; SUPERCONDUCTIVITY; COEXISTENCE; DICHROISM}}, Research-Areas = {{Physics}}, Web-of-Science-Categories = {{Physics, Multidisciplinary}}, Author-Email = {{marco.salluzzo@spin.cnr.it giacomo.ghiringhelli@polimi.it}}, ResearcherID-Numbers = {{Nolting, Frithjof/J-4820-2017 Piamonteze, Cinthia/E-9740-2016 salluzzo, marco/C-5919-2009 Brookes, Nicholas B/C-6718-2019 Brune, Harald/E-7284-2017 stornaiuolo, daniela/D-2516-2014 Ghiringhelli, Giacomo/D-1159-2014 Marre, Daniele/G-5965-2014 }}, ORCID-Numbers = {{Nolting, Frithjof/0000-0002-5679-5370 salluzzo, marco/0000-0001-8372-6963 Brookes, Nicholas B/0000-0002-1342-9530 Brune, Harald/0000-0003-4459-3111 Ghiringhelli, Giacomo/0000-0003-0867-7748 Marre, Daniele/0000-0002-6230-761X STORNAIUOLO, Daniela/0000-0003-2654-9504 Rusponi, Stefano/0000-0002-8494-5532 Minola, Matteo/0000-0003-4084-0664}}, Funding-Acknowledgement = {{European UnionEuropean Union (EU) {[}264098-MAMA]; Italian MIURMinistry of Education, Universities and Research (MIUR) {[}PRIN 20094W2LAY]}}, Funding-Text = {{The authors are grateful to Jean-Marc Triscone, Jochen Mannhart, and Mathieu Le Tacon for useful discussions. We also acknowledge P. Zubko for the characterization of BiMnO<INF>3</INF>/SrTiO<INF>3</INF> films. This research was funded by the European Union Seventh Framework Program under Grant Agreement No. 264098-MAMA and from the Italian MIUR Grant No. PRIN 20094W2LAY.}}, Number-of-Cited-References = {{32}}, Times-Cited = {{120}}, Usage-Count-Last-180-days = {{9}}, Usage-Count-Since-2013 = {{169}}, Journal-ISO = {{Phys. Rev. Lett.}}, Doc-Delivery-Number = {{206BG}}, Unique-ID = {{ISI:000323490300010}}, OA = {{Green Accepted}}, DA = {{2020-12-22}}, }
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