Changes of Crystal Structure in Antiferromagnetic Compounds

Autor:	H. P. Rooksby, N. C. Tombs
Rok vydání:	1951
Předmět:	Multidisciplinary Materials science Condensed matter physics Neutron diffraction Oxide Crystal structure Metal chemistry.chemical_compound Lattice constant chemistry visual_art visual_art.visual_art_medium Curie Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Spin-½
Zdroj:	Nature. 167:364-364
ISSN:	1476-4687 0028-0836
DOI:	10.1038/167364a0
Popis:	A RECENT communication by Selma Greenwald and J. S. Smart1 has directed attention to the significance of the structural deformations observed by us in monoxides of the transition elements2 in relation to their antiferromagnetic behaviour. It is particularly noteworthy that the temperatures at which departure from the high-symmetry face-centred cubic structure cell is first manifest are almost exactly the antiferromagnetic Curie temperatures. It would appear that deformations of the simpler arrangements existing above these Curie temperatures are a natural consequence of the setting of adjacent magnetic atoms in anti-parallel spin orientations below these temperatures. Neutron diffraction work on manganous oxide by Shull3 has shown that the magnetic cell has a lattice constant double that of the elementary structure cell; but it remains for X-rays to demonstrate the change in shape consequent upon the preferential arrangement of the metal atoms.
Databáze:	OpenAIRE
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