Torque magnetometry of an amorphous-alumina/strontium-titanate interface
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
- Harvard Univ., Cambridge, MA (United States). Dept. of Chemistry and Chemical Biology
Here, we report torque magnetometry measurements of an oxide heterostructure consisting of an amorphous Al2O3 thin film grown on a crystalline SrTiO3 substrate (α -AO/STO) by atomic layer deposition. We find a torque response that resembles previous studies of crystalline LaAlO3/SrTiO3 (LAO/STO) heterointerfaces, consistent with strongly anisotropic magnetic ordering in the plane of the interface. Unlike crystalline LAO, amorphous Al2O3 is nonpolar, indicating that planar magnetism at an oxide interface is possible without the strong internal electric fields generated within the polarization catastrophe model. We discuss our results in the context of current theoretical efforts to explain magnetism in crystalline LAO/STO.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation (GBMF); National Science Foundation (NSF)
- Grant/Contract Number:
- FG02-08ER46514; GBMF2931; 1122374
- OSTI ID:
- 1505752
- Alternate ID(s):
- OSTI ID: 1181027
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 20; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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