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Title: Study of resistive switching and magnetism modulation in the Pt/CoFe{sub 2}O{sub 4}/Nb:SrTiO{sub 3} heterostructures

CoFe{sub 2}O{sub 4} (CFO) thin films are epitaxially grown on Nb doped (001) SrTiO{sub 3} (NSTO) single-crystal substrates by pulsed laser deposition to form Pt/CFO/NSTO heterostructures. These heterostructures exhibit typical bipolar resistive switching effect with maximum switching ratio of 5 × 10{sup 4}, multi-level resistance states, excellent retention, and anti-fatigue properties. When the resistance states of the heterostructures are switched between low resistance state and high resistance state upon applying bias voltages, the saturation magnetization of the CFO films shows corresponding changes associated with the resistive switching. These close correlations between the resistive switching and the magnetization can be attributed to the electrons filling into and releasing from the defect energy levels introduced by oxygen vacancies in the CFO film. These results show potential application in the multi-functional magnetoelectric sensor and non-volatile multi-level resistive switching memory.
Authors:
; ; ; ; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. School of Physics and Technology, and Key Laboratory of Artificial Micro/Nano Structures of the Ministry of Education, Wuhan University, Wuhan 430072 (China)
  2. (China)
  3. School of Electrical Engineering and Automation, Henan Polytechnique University, Jiaozuo, Henan (China)
Publication Date:
OSTI Identifier:
22492700
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 6; 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; 36 MATERIALS SCIENCE; COBALT COMPOUNDS; DOPED MATERIALS; ELECTRIC POTENTIAL; ELECTRICAL PROPERTIES; ENERGY BEAM DEPOSITION; ENERGY LEVELS; EPITAXY; IRON OXIDES; LASER RADIATION; MAGNETIC PROPERTIES; MAGNETISM; MAGNETIZATION; MONOCRYSTALS; NIOBIUM; OXYGEN; PULSED IRRADIATION; SENSORS; STRONTIUM TITANATES; THIN FILMS; VACANCIES; VOLATILITY