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

Journal Article · Mon Aug 10 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4928337· OSTI ID:22492700

Wang, Qiangwen; Zhao, Meng; Wei, Maocai; Zhang, Feng; Zhang, Yuan; Sun, Beilei; Li, Meiya ^[1]; Zhu, Yongdan ^[1]; Liu, Xiaolian ^[2]

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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. School of Electrical Engineering and Automation, Henan Polytechnique University, Jiaozuo, Henan (China)

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.

• OSTI ID: 22492700
• Journal Information: Applied Physics Letters, Vol. 107, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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