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Transition‐Metal‐Rich Borides – Fascinating Crystal Structures and Magnetic Properties
Author(s) -
Fokwa Boniface P. T.
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000116
Subject(s) - boride , chemistry , crystal structure , transition metal , boron , crystallography , valence electron , density functional theory , valence (chemistry) , electronic structure , condensed matter physics , chemical physics , nanotechnology , electron , computational chemistry , materials science , inorganic chemistry , catalysis , physics , biochemistry , quantum mechanics , organic chemistry
The ability to design and predict new phases in solid‐state chemistry remains a challenge. However, experiment and theory have been working together in the last decade to find new phases with targeted magnetic properties in the family of transition‐metal‐rich borides. These studies were very successful for boride phases crystallizing with the Ti 3 Co 5 B 2 structure type. Furthermore, strong variations of the magnetic properties in some series of compounds as a function of the number of valence electrons were observed experimentally and explained by using density functional theory calculations. The Zn 11 Rh 18 B 8 and Th 7 Fe 3 structure types have also produced many magnetically ordered phases, whereas the new Ti 1.6 Os 1.4 RuB 2 and Ti 1+ x Rh 2– x + y Ir 3– y B 2 structure types have the potential to produce new materials with interesting magnetic properties. The large family of perovskite boride phases has welcomed new members whose structures enable the ordering of boron atoms and vacancies. Renewed interest has been observed for boride phases crystallizing with the Cr 23 C 6 ‐type structure, whose magnetic properties were mainly studied before the nineties.