Crystal structure, magnetic state and electrical resistivity of Fe2/3Ti(S,Se)(2) as affected by anionic substitutions / Selezneva N. V.,Sherokalova E. M.,Volegov A. S.,Shishkin D. A.,Baranov N. V. // MATERIALS RESEARCH EXPRESS. - 2017. - V. 4, l. 10.

ISSN/EISSN:

2053-1591 / нет данных

Type:

Article

Abstract:

The layered compounds Fe2/3TiS2-ySey (0 <= y <= 2) have been synthesized and studied by means of x-ray diffraction, magnetization, electrical resistivity and magnetoresistance measurements in order to reveal how the Se for S substitution affects the crystal structure and properties of these materials. Together with the growth of the unit cell volume the replacement of S by Se in Fe2/3TiS2-ySey leads to anisotropic deformations of the crystal lattice assumingly due to the formation of Fe chains in the ab plane of the crystal lattice and a higher polarizability of Se. The Fe2/3TiS2 compound shows the magnetization behavior characteristic for the highly anisotropic ferrimagnetic materials, while the Se for S substitution leads to an antiferromagnetic ordering in Fe2/3TiS2-ySey at y > 0.5, which is attributed to increasing randomness in the distribution of Fe atoms and vacancies in cationic layers. At low temperatures, the sulfur rich Fe2/3TiS2-ySey compounds exhibit increased magnetic hardness (H-c similar to (8-22) kOe). Unlike antiferromagnetic Fe1/2TiS2-ySey compounds with a metallic-type resistivity behavior the electrical resistivity of Fe2/3TiS2-ySey in the magnetically ordered state is observed to be higher than in the paramagnetic state. An additional magnetic contribution to the resitivity which does not vanishes at T -> 0 is ascribed to the appearance of the magnetic-polaron-like states in compounds due to the the partial Fe-Ti mixing in cationic layers.

Author keywords:

transition metal chalcogenides; substitutions; crystal structure; magnetic ordering; electrical resistivity; Fe2/3Ti(S,Se)(2) TRANSITION-METAL; INTERCALATION COMPOUND; NEUTRON-DIFFRACTION; TITANIUM DISELENIDE; IRON; FEXTIS2; TIS2; CR; FE; DICHALCOGENIDES

DOI:

10.1088/2053-1591/aa8eb7

Web of Science ID:

ISI:000413094200002

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	106102
Keywords-Plus	TRANSITION-METAL; INTERCALATION COMPOUND; NEUTRON-DIFFRACTION; TITANIUM DISELENIDE; IRON; FEXTIS2; TIS2; CR; FE; DICHALCOGENIDES
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	baranov@imp.uran.ru
ResearcherID-Numbers	Baranov, Nikolai/J-5042-2013
ORCID-Numbers	Baranov, Nikolai/0000-0002-9720-5314
Funding-Acknowledgement	Ministry of Education and Science of Russia {[}3.2916.2017/4.6]; RFBR {[}16-02-00480, 16-03-00733]; FASO of Russia {[}01201463328]
Funding-Text	The present work was supported by the Ministry of Education and Science of Russia (project No 3.2916.2017/4.6), by RFBR (project Nos 16-02-00480 and 16-03-00733) and by FASO of Russia (theme No 01201463328).
Number-of-Cited-References	51
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	2
Journal-ISO	Mater. Res. Express
Doc-Delivery-Number	FJ9JY