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Enhancement of ferromagnetism in BaFeO 3 ‐KTa 0.47 Nb 0.53 O 3 multilayers compared to pseudo‐cubic BaFeO 3 thin film grown by pulsed laser deposition
Author(s) -
Cianfrone Joe,
Ghosh Siddhartha,
Kim Seonhoo,
Kim KyeongWon,
Hebard Arthur. F.,
Norton David
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600707
Subject(s) - magnetization , materials science , curie temperature , analytical chemistry (journal) , ferromagnetism , x ray photoelectron spectroscopy , ferroelectricity , pulsed laser deposition , transmission electron microscopy , thin film , condensed matter physics , nuclear magnetic resonance , chemistry , nanotechnology , optoelectronics , magnetic field , physics , chromatography , quantum mechanics , dielectric
Oxide multilayer hetero‐structure of BaFeO 3 ‐KTa 0.47 Nb 0.53 O 3 have been grown using the pulsed laser deposition and the ex situ annealed in a flowing oxygen atmosphere. The multilayer has been characterized using X‐ray diffraction, transmission electron microscopy, and X‐ray photoelectron spectroscopy. Magnetic properties have been studied via SQUID measurements. Magnetization in the multilayer structure shows significant improvement compared to previous measurements of bare BaFeO 3 . Measuring magnetization as a function of temperature and fitting the resulting M–T curves to Bloch's 3/2 law, yields an estimated Curie temperature ( T C ) of around 425 K and a P factor of around 1.5, consistent with magnetization from a three dimensional crystal structure. In spite of using a room temperature ferroelectric KTa 0.47 Nb 0.53 O 3 composition, no evidence of ferroelectricity was observed in multi‐layer structure.