Interfacial Ferromagnetism inSuperlattices
- 21 August 2013
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 111 (8), 087202
- https://doi.org/10.1103/physrevlett.111.087202
Abstract
We observe interfacial ferromagnetism in superlattices of the paramagnetic metal LaNiO3 and the antiferromagnetic insulator CaMnO3. LaNiO3 exhibits a thickness dependent metal-insulator transition and we find the emergence of ferromagnetism to be coincident with the conducting state of LaNiO3. That is, only superlattices in which the LaNiO3 layers are metallic exhibit ferromagnetism. Using several magnetic probes, we have determined that the ferromagnetism arises in a single unit cell of CaMnO3 at the interface. Together these results suggest that ferromagnetism can be attributed to a double exchange interaction among Mn ions mediated by the adjacent itinerant metal.Comment: Accepted for publication in Physical Review Letters (http://prl.aps.org/), copyright (2013) by the American Physical SocietKeywords
This publication has 23 references indexed in Scilit:
- Interfacial Ferromagnetism and Exchange Bias inSuperlatticesPhysical Review Letters, 2012
- Exchange bias in LaNiO3-LaMnO3 superlatticesNature Materials, 2012
- Critical thickness for ferromagnetism in LaAlO3/SrTiO3 heterostructuresNature Communications, 2012
- Upper Limit to Magnetism inHeterostructuresPhysical Review Letters, 2011
- Metal-Insulator Transition in UltrathinFilmsPhysical Review Letters, 2011
- Dimensionality Control of Electronic Phase Transitions in Nickel-Oxide SuperlatticesScience, 2011
- Charge transport and magnetization profile at the interface between the correlated metaland the antiferromagnetic insulatorPhysical Review B, 2010
- Electron Leakage and Double-Exchange Ferromagnetism at the Interface between a Metal and an Antiferromagnetic Insulator:Physical Review Letters, 2007
- Interface ferromagnetism in oxide superlattices of CaMnO3/CaRuO3Applied Physics Letters, 2001
- Ferromagnetism and metallicity in the CaMn1−xRuxO3 perovskites: a highly inhomogeneous systemSolid State Communications, 2001