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Interface‐Induced Modulation of Charge and Polarization in Thin Film Fe 3 O 4
Author(s) -
Tian He,
Verbeeck Jo,
Brück Sebastian,
Paul Markus,
Kufer Dominik,
Sing Michael,
Claessen Ralph,
Tendeloo Gustaaf Van
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201303329
Subject(s) - polarization (electrochemistry) , materials science , ion , nanotechnology , optoelectronics , engineering physics , physics , quantum mechanics , chemistry
Charge and polarization modulations in Fe 3 O 4 are controlled by taking advantage of interfacial strain effects. The feasibility of oxidation state control by strain modification is demonstrated and it is shown that this approach offers a stable configuration at room temperature. Direct evidence of how a local strain field changes the atomic coordination and introduces atomic displacements leading to polarization of Fe ions is presented.