Magnetic properties of La(0.67)Sr(0.33)MnO3/BiFeO3(001) heterojunctions: chemically abrupt versus atomic intermixed interface
| Autor: | Neumann, R. F., Bahiana, M., Binggeli, N. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | EPL 100 (2012) 67002 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1209/0295-5075/100/67002 |
| Popis: | Using first-principles density-functional calculations, we address the magnetic properties of the ferromagnet/antiferromagnet La(0.67)Sr(0.33)MnO3/BiFeO3(001) heterojunctions, and investigate possible driving mechanisms for a ferromagnetic (FM) interfacial ordering of the Fe spins recently observed experimentally. We find that the chemically abrupt defect-free La(0.67)Sr(0.33)MnO3/BiFeO3(001) heterojunction displays, as ground state, an ordering with compensated Fe spins. Cation Fe/Mn intermixing at the interface tends to favour, instead, a FM interfacial order of the Fe spins, coupled antiferromagnetically to the bulk La(0.67)Sr(0.33)MnO3 spins, as observed experimentally. Such trends are understood based on a model description of the energetics of the exchange interactions. Comment: 6 pages, 6 figures |
| Databáze: | arXiv |
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