Electromigration of oxygen and resistive state transitions in sub-micron width long strip of La0.85Sr0.15MnO3 connected to an engineered oxygen source
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Electromigration of oxygen and resistive state transitions in sub-micron width long strip of La0.85Sr0.15MnO3 connected to an engineered oxygen source
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| Creator |
Malla Chowdhury, Putul
Raychaudhuri, A K |
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| Subject |
Engineering Materials
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| Description |
Oxygen electromigration studies have been carried out on long and submicron width strips of La0.85Sr0.15MnO3 (LSMO:0.15) film on LaAlO3 substrate with lithographically defined oxygen source created by local electrochemical oxidation. Electromigration by short duration current stressing leads to transition from a high resistance state (HRS) to a metastable low resistance state (LRS) that recovers back after a wait time (t(W)). Sustained current stressing beyond a critical current leads to irreversible RS transition to a stable LRS. The transition has an Arrhenius type temperature dependence with an activation energy similar to 0.45-0.55 eV. Heating suppresses the transition and RS vanishes at a temperature T-0 >= 375 K. It is suggested that the irreversible transition happens due to phase transition from a higher resistance Jahn-Teller distorted orthorhombic phase (O') to a undistorted orthorhombic (O) phase which have close proximity at room temperature in LSMO:0.15 and are sensitive to current induced hole doping.
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| Publisher |
Elsevier
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| Date |
2021-05
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| Type |
Article
PeerReviewed |
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| Identifier |
Malla Chowdhury, Putul and Raychaudhuri, A K (2021) Electromigration of oxygen and resistive state transitions in sub-micron width long strip of La0.85Sr0.15MnO3 connected to an engineered oxygen source. Materials Research Bulletin, 137. Art No-111160. ISSN 0025-5408
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| Relation |
http://cgcri.csircentral.net/5268/
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