Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4945682
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Funding
- FAME, one of the six centers of STARnet, a Semiconductor Research Corporation program - MARCO
- FAME, one of the six centers of STARnet, a Semiconductor Research Corporation program - DARPA
- Intel [2011-IN-2152]
- NSF [ECCS-1309416]
- Nanoelectronics Research Corporation (NERC), a wholly owned subsidiary of the Semiconductor Research Corporation (SRC), through the Center for Nanoferroic Devices (CNFD), an SRC-NRI Nanoelectronics Research Initiative Center [2398.003]
- DFG/NSF
- CAPES Foundation
- CNPq Foundation
- Ministry of Education of Brazil
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We study perpendicular magnetic anisotropy in thin films of Ta/Co20Fe60B20/MgO by ferromagnetic resonance and find a linear temperature dependence for the first and second order uniaxial terms from 5 to 300 K. Our data suggest the possible hybridization of Fe-O orbitals at the CoFeB/MgO interface for the origin of the first order anisotropy. However, we also find that non-interfacial contributions to the anisotropy are present. An easy-cone anisotropy is found for the entire temperature range in the narrow region of film thicknesses around the spin reorientation transition 1.2-1.35 nm. (C) 2016 AIP Publishing LLC.
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