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標題: Surface engineering with Ar+/O-2(+) ion beam bombardment: Tuning the electronic and magnetic behavior of Ni80Fe20/La0.7Sr0.3MnO3/SrTiO3(001) junctions
作者: I. Bergenti
P. K. Manna
C.-H. Lin
P. Graziosi
X. Liu
G. L. Causer
F. Liscio
A. Ruotolo
V. A. Dediu
J. van Lierop
F. Klose
K.-W. Lin
Project: Journal of Applied Physics 124, 183903
The magnetic and magnetotransport properties of Ni80Fe20/La0.7Sr0.3MnO3 (NiFe/LSMO) bilayers were investigated after bombarding the LSMO surface with low-energy Ar+ or O2+/Ar+ ion beams before the growth of the top NiFe layer. A variety of magnetic properties are revealed, including an asymmetric two-stepped hysteresis loop with an exchange bias loop shift, and alternatively, a symmetric two-stepped hysteresis loop with an enhanced coercivity. Polarized neutron reflectometry measurements provide details of the magnetic depth profile and interface layer magnetism at different temperatures. The LSMO surface modifications determine a complex magnetic and electric NiFe/LSMO interface having a strong effect on the magnetoresistance of the bilayer. Surface engineering based on ion beam bombardment is presented as a promising technique for optimizing the electronic and magnetic properties of NiFe/LSMO junctions for future device applications.
DOI: 10.1063/1.5049235
Appears in Collections:材料科學與工程學系

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