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A Ferrimagnetic Manganese Oxide with a Layered Perovskite Structure: YBaMn 2 O 5
Author(s) -
Chapman Jon P.,
Attfield J. Paul,
Molgg Michele,
Friend Chris M.,
Beales Tim P.
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199624821
Subject(s) - ferrimagnetism , manganese , valence (chemistry) , manganese oxide , perovskite (structure) , magnetoresistance , condensed matter physics , materials science , ion , oxide , spheres , superconductivity , crystallography , chemistry , magnetization , physics , metallurgy , magnetic field , organic chemistry , quantum mechanics , astronomy
A structure reminiscent of the YBa 2 Cu 3 O 7 superconductor is shown by the novel reduced manganese perovskite YBaMn 2 O 5 (on the right), in which double layers of MnO 5 square pyramids enclose the Ba 2+ ions (large spheres), while Y 3+ ions (medium‐sized black spheres) lie between the layers. Unlike many oxidized Mn perovskites, YBaMn 2 O 5 does not exhibit magnetoresistive effects. Instead a ferrimagnetic transition occurs at 167 K which may be due to Mn 2+ /Mn 3+ valence and spin ordering.