Reversible magnetoelectric switching by electrochemical lithium intercalation
The aim of the project is in the long run to observe the relation between charge ordering and magnetism in manganites. La1-xSrxMO3 shows transitions between ferromagnetism (FM) and paramagnetism at room temperature and between antiferromagnetism (AFM) and FM at lower T for x roughly 0.5. It is believed that the driving force is the ordering of Mn3+ and Mn4+, which sets in at x about 0.5. Our approach is to reversibly change the Mn3+ / Mn4+ ratio by de-/lithiating the material electrochemically and to monitor the process in-situ with Polarized Neutron Reflectometry (PNR). Samples of various compositions were grown by Pulsed Laser Deposition and characterized structurally and electrochemically. The first in-situ PNR measurements at Amor (PSI) with a liquid electrolyte gave hints that LSMO undergoes the phase transition. We want to perform further PNR measurements using a solid state electrolyte to prove the reversibility of the process by performing several de-/lithiation cycles and by monitoring it in-situ. A repetition at low temperatures (150 K) then probes the interesting transition FM/AFM.
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BIMASHOFER Gesara; SAERBECK Thomas and STAHN Jochen. (2019). Reversible magnetoelectric switching by electrochemical lithium intercalation. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-284
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