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The structure of the new compound YBaCo4O7 with a magnetic feature
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-9858-6235
2002 (English)In: Solid State Sciences, ISSN 1293-2558, Vol. 4, no 7, 923-931 p.Article in journal (Refereed) Published
Abstract [en]

Single crystals and pure powder samples of the new compound YBaCo4O7 have been obtained by solid-state reactions, using different temperature programs. From X-ray powder diffraction the structure was determined as hexagonal, space group P6(3)mc. having the cell parameters a = 6.2982(4) and c = 10.2467(9) Angstrom. This phase is isostructural with that previously reported for LuBaZn3.09Al0.91O7. Refinements of powder neutron diffraction data collected at two different temperatures and X-ray single crystal data at room temperature, agree well. Changes with temperature in the relative positions of Co and its surrounding oxygen atoms are the only geometrical manifestation of a probable spin-glass transition at about 65 K from the high temperature paramagnetic state.

Place, publisher, year, edition, pages
2002. Vol. 4, no 7, 923-931 p.
Keyword [en]
cobalt oxides, geometrical frustration, single crystal XRD, NPD, neutron-diffraction, crystal-structure, x-ray, oxides, ho, dy, gd, eu, sm
URN: urn:nbn:se:kth:diva-21887ISI: 000177955700007OAI: diva2:340585
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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