TY  - JOUR
AU  - Valant, Matjaz
AU  - Arcon, Iztok
AU  - Mikulska, Iuliia
AU  - Lisjak, Darja
TI  - Cation Order-Disorder Transition in Fe-Doped 6H−BaTiO<sub>3</sub> for Dilute Room-Temperature Ferromagnetism
JO  - Chemistry of materials
VL  - 25
IS  - 17
SN  - 0897-4756
CY  - Washington, DC
PB  - American Chemical Society
M1  - PUBDB-2014-04423
SP  - 3544 - 3550
PY  - 2013
N1  - © American Chemical Society
AB  - Understanding the fundamental spin coupling mechanisms indilute magnetic oxides is not possible without exact atomistic understanding ofthe solids. This is even more important for few systems that show diluteferromagnetism at room temperature and could potentially be used in spintronicand multiferroic technologies. Here, we show the first known example of a cationordering in hexagonal 6H-perovskites. Fe3+ ions in Fe-doped 6H-BaTiO3 areinitially randomly distributed over two Ti4+ crystallographic sites but can be, by aprolonged heat treatment, ordered onto one of the sites. The cation ordering isdriven by reduction in the electrostatic repulsion, which occurs when Fe3+substitutes the highly charged Ti4+ ions that are located at unusual proximity toeach other. We show that such a continuous order−disorder transition isassociated with induction of the room-temperature dilute ferromagnetism.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000330097900019
DO  - DOI:10.1021/cm402353t
UR  - https://bib-pubdb1.desy.de/record/192939
ER  -