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Title: Interface magnetization transition via minority spin injection

The interface magnetization of n-type BaTiO 3/La 0.7Sr 0.3MnO 3 heterojunction is selectively probed by magnetic second-harmonic generation at 80 K. Additionally, the injection of minority spins at the interface causes a sudden, reversible transition of the spin alignment of interfacial Mn ions from ferromagnetic to antiferromagnetic exchange coupled, while the bulk magnetization remains unchanged. We attribute the emergent interfacial antiferromagnetic interactions to weakening of the double-exchange mechanism caused by the strong Hund’s rule coupling between injected minority spins and local magnetic moments. Lastly, the effect is robust and may serve as a viable route for electronic and spintronic applications.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [1]
  1. College of William and Mary, Williamsburg, VA (United States). Department of Applied Science
  2. Pennsylvania State Univ., University Park, PA (United States). Department of Physics
Publication Date:
Grant/Contract Number:
FG02-04ER46127; FG02-08ER4653
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 23; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
College of William and Mary, Williamsburg, VA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
OSTI Identifier:
1465954
Alternate Identifier(s):
OSTI ID: 1334680

Fang, F., Zhai, H., Ma, X., Yin, Y. W., Li, Qi, and Lüpke, G.. Interface magnetization transition via minority spin injection. United States: N. p., Web. doi:10.1063/1.4972035.
Fang, F., Zhai, H., Ma, X., Yin, Y. W., Li, Qi, & Lüpke, G.. Interface magnetization transition via minority spin injection. United States. doi:10.1063/1.4972035.
Fang, F., Zhai, H., Ma, X., Yin, Y. W., Li, Qi, and Lüpke, G.. 2016. "Interface magnetization transition via minority spin injection". United States. doi:10.1063/1.4972035. https://www.osti.gov/servlets/purl/1465954.
@article{osti_1465954,
title = {Interface magnetization transition via minority spin injection},
author = {Fang, F. and Zhai, H. and Ma, X. and Yin, Y. W. and Li, Qi and Lüpke, G.},
abstractNote = {The interface magnetization of n-type BaTiO3/La0.7Sr0.3MnO3 heterojunction is selectively probed by magnetic second-harmonic generation at 80 K. Additionally, the injection of minority spins at the interface causes a sudden, reversible transition of the spin alignment of interfacial Mn ions from ferromagnetic to antiferromagnetic exchange coupled, while the bulk magnetization remains unchanged. We attribute the emergent interfacial antiferromagnetic interactions to weakening of the double-exchange mechanism caused by the strong Hund’s rule coupling between injected minority spins and local magnetic moments. Lastly, the effect is robust and may serve as a viable route for electronic and spintronic applications.},
doi = {10.1063/1.4972035},
journal = {Applied Physics Letters},
number = 23,
volume = 109,
place = {United States},
year = {2016},
month = {12}
}