ORBi: Thammajak N - Structural Chemistry and Spin-glass Behaviour of Nd18Li8Fe4TiO39

Reference : Structural Chemistry and Spin-glass Behaviour of Nd18Li8Fe4TiO39


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/128430

Title :	Structural Chemistry and Spin-glass Behaviour of Nd18Li8Fe4TiO39
Language :	English
Alternative title :	[en] Chimie structurale et comportement de verre de spin de Nd18Li8Fe4TiO39
Author, co-author :	Thammajak, N [University of Oxford > Inorganic Chemistry > > >]
	Battle, Peter D. [University of Oxford > Inorganic Chemistry > > >]
	Grandjean, Fernande [Université de Liège - ULg > Département de physique > Département de physique >]
	Long, Gary J. [Missouri University of Science and Technology > Chemistry > > >]
	Ramos, S []
Publication date :	2012
Journal title :	Journal of Solid State Chemistry
Publisher :	Academic Press
Volume :	187
Pages :	75-82
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0022-4596
City :	San Diego
Country :	CA
Keywords :	[en] x-ray diffraction ; magnetic properties ; Mossbauer spectroscopy
Abstract :	[en] Nd18Li8Fe4TiO39 has been synthesised and characterised by neutron powder diffraction, X-ray absorption spectroscopy, Mossbauer spectroscopy and magnetometry. The cubic structure (Pm3 n, a=411.97227(8) Å) is based on intersecting <1 1 1> chains comprised of alternating octahedral and trigonal-prismatic coordination sites. These chains lie within hexagonal-prismatic cavities formed by a Nd–O framework. The larger of the two crystallographically distinct octahedral sites, 8e, is occupied by iron, titanium and lithium in a ratio of 76:20:4; the smaller, 2a, is occupied by iron and titanium in a ratio of 79:21. The trigonal-prismatic site, 16i, is occupied by lithium and iron in a ratio of 98:2. The cations on the 2a sites are assigned as Ti4+and low-spin Fe4+, and those on the 16i sites as Li+ and Fe3+. The 8e sites are thought to be occupied by Li+, Fe3+ and Ti3+. Nd18Li8Fe4TiO39 undergoes a transition to a spin-glass state at 4.25(5) K.
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/128430

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