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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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.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Dec 2021 12:22
Last Modified: 16 Dec 2021 12:22

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