Origin of hysteresis in resistive switching in magnetite is Joule heating
Citation:
A. A. Fursina, R. G. S. Sofin, I. V. Shvets, D. Natelson, Origin of hysteresis in resistive switching in magnetite is Joule heating, Physical Review B, 79, 24, 2009, 245131-Download Item:
Abstract:
In many transition-metal oxides the electrical resistance is observed to undergo dramatic changes induced by large biases. In magnetite, Fe3O4, below the Verwey temperature, an electric-field-driven transition to a state of lower resistance was recently found, with hysteretic current-voltage response. We report the results of pulsed electrical conduction measurements in epitaxial magnetite thin films. We show that while the high- to low-resistance transition is driven by electric field, the hysteresis observed in I-V curves results from Joule heating in the low-resistance state. The shape of the hysteresis loop depends on pulse parameters and reduces to a hysteresis-free ?jump? of the current provided thermal relaxation is rapid compared to the time between voltage pulses. A simple relaxation-time thermal model is proposed that captures the essentials of the hysteresis mechanism.
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/ivchvetsDescription:
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Author: SHVETS, IGOR
Sponsor:
Science Foundation Ireland (SFI)Type of material:
Journal ArticleCollections
Series/Report no:
Physical Review B79
24
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Full text availableKeywords:
Physics, hysteresisSubject (TCD):
Nanoscience & MaterialsMetadata
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