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Title: Irreversible electrical manipulation of magnetization on BiFeO{sub 3}-based heterostructures

We prepared several heterostructures, Co/Bi{sub 0.90}La{sub 0.10}FeO{sub 3} on surface oxidized Si or (111) SrTiO{sub 3} and NiFe/Bi{sub 0.90}La{sub 0.10}FeO{sub 3} on (001) SrTiO{sub 3} substrates using LaNiO{sub 3} as bottom electrode. With different strategies of voltage application, the exchange bias field H{sub E} decreased with increasing voltage irreversibly for all the heterostructures at room temperature. The chemical state at the NiFe/Bi{sub 0.90}La{sub 0.10}FeO{sub 3} interface was studied by X-ray photoelectron spectroscopy before and after the electrical manipulation. The oxidization of the metallic ferromagnetic layer at interface after the electrical manipulation has been confirmed, which might explain the irreversibility.
Authors:
;  [1] ;  [2] ;  [2] ; ;  [3] ;  [2] ;  [4]
  1. Department of Physics, Southeast University, Nanjing 211189 (China)
  2. (China)
  3. Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
  4. Department of Materials Science and Engineering, Nanjing University, Nanjing 210008 (China)
Publication Date:
OSTI Identifier:
22410094
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH COMPOUNDS; CHEMICAL STATE; COBALT; ELECTRIC POTENTIAL; ELECTRODES; FERRITES; FERROMAGNETIC MATERIALS; FERROMAGNETISM; HETEROJUNCTIONS; INTERFACES; LANTHANUM COMPOUNDS; LAYERS; MAGNETIZATION; STRONTIUM TITANATES; SUBSTRATES; SURFACES; TEMPERATURE RANGE 0273-0400 K; X-RAY PHOTOELECTRON SPECTROSCOPY