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Title: Growth-Induced In-Plane Uniaxial Anisotropy in V2O3/Ni Films

Journal Article · · Scientific Reports
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [4]; ORCiD logo [5];  [6]
  1. Univ. of California, Davis, CA (United States); NIST Center for Neutron Research, Gaithersburg, MD (United States); OSTI
  2. Univ. de los Andes, Bogota (Colombia)
  3. Institut Laue-Langevin, Grenoble cedex (France)
  4. Univ. of California, San Diego, CA (United States)
  5. Univ. of California, Davis, CA (United States)
  6. Colorado State Univ., Fort Collins, CO (United States)

We report on a strain-induced and temperature dependent uniaxial anisotropy in V2O3/Ni hybrid thin films, manifested through the interfacial strain and sample microstructure, and its consequences on the angular dependent magnetization reversal. X-ray diffraction and reciprocal space maps identify the in-plane crystalline axes of the V2O3; atomic force and scanning electron microscopy reveal oriented rips in the film microstructure. Quasi-static magnetometry and dynamic ferromagnetic resonance measurements identify a uniaxial magnetic easy axis along the rips. Comparison with films grown on sapphire without rips shows a combined contribution from strain and microstructure in the V2O3/Ni films. Magnetization reversal characteristics captured by angular-dependent first order reversal curve measurements indicate a strong domain wall pinning along the direction orthogonal to the rips, inducing an angular-dependent change in the reversal mechanism. Lastly, the resultant anisotropy is tunable with temperature and is most pronounced at room temperature, which is beneficial for potential device applications.

Research Organization:
Univ. of California, San Diego, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-87ER45332
OSTI ID:
1500097
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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