Effects of S-Se substitution and magnetic field on magnetic order in Fe0.5Ti(S,Se)(2) layered compounds / Gubkin A. F.,Sherokalova E. M.,Keller L.,Selezneva N. V.,Proshkin A. V.,Proskurina E. P.,Baranov N. V. // JOURNAL OF ALLOYS AND COMPOUNDS. - 2014. - V. 616, l. . - P. 148-154.

ISSN/EISSN:

0925-8388 / 1873-4669

Type:

Article

Abstract:

Powder neutron diffraction and specific heat measurements have been employed to study the evolution of an antiferromagnetic (AFM) structure in the intercalated Fe0.5TiS2-ySey compounds with S-Se substitution and under application of a magnetic field. In Fe0.5TiS2 (y = 0), the magnetic structure just below T-N similar or equal to 140 K is incommensurate while it becomes commensurate with further cooling below T-t similar or equal to 125 K. The presence of two magnetic phase transitions at T-t and T-N in Fe0.5TiS2 is confirmed by specific heat measurements. The field-induced AFM-FM transitions occurring in Fe0.5TiS2 within temperature interval T-t < T < T-N and below T-t are evidenced by neutron diffraction measurements under application of a magnetic field. Unlike Fe0.5TiS2 having a quadruplicated AFM structure, the compounds with the Se concentrations y > 0.5 are observed to exhibit an AFM structure with the doubled magnetic unit cell along a and c crystallographic directions of the monoclinic crystal lattice (I12/m1 space group). In the transition region around the critical Se concentration y(c) approximate to 0.5, the magnetic structure of Fe0.5TiS2-ySey is found to be incommensurate. The appearance of the AFM order with decreasing temperature in Fe0.5TiS2-ySey is accompanied by anisotropic deformations of the crystal lattice. At low temperatures, the Fe magnetic moments in all Fe0.5TiS2-ySey form an angle 14-16 degrees to the c crystallographic direction, which can be ascribed to the crystal field effects and spin-orbit couplings. (C) 2014 Elsevier B.V. All rights reserved.

Author keywords:

Magnetically ordered materials; Phase transitions; Heat capacity; Exchange and superexchange; Neutron diffraction 3D TRANSITION-METAL; ELECTRICAL-RESISTIVITY; HIGH-PRESSURE; STATE; CRYSTAL; FEXTIS2; FETI2S4

DOI:

10.1016/j.jallcom.2014.06.195

Web of Science ID:

ISI:000342654000023

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC 15
Publisher	ELSEVIER SCIENCE SA
Address	PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Language	English
EISSN	1873-4669
Keywords-Plus	3D TRANSITION-METAL; ELECTRICAL-RESISTIVITY; HIGH-PRESSURE; STATE; CRYSTAL; FEXTIS2; FETI2S4
Research-Areas	Chemistry; Materials Science; Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy \& Metallurgical Engineering
Author-Email	agubkin@imp.uran.ru baranov@imp.uran.ru
ResearcherID-Numbers	Gubkin, Andrey/J-3240-2013 Baranov, Nikolai/J-5042-2013
ORCID-Numbers	Gubkin, Andrey/0000-0002-4280-7561 Baranov, Nikolai/0000-0002-9720-5314
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-02-00364, 14-02-92104]; Ural Branch of RAS {[}12-T-2-1012]
Funding-Text	This work is partly based on experiments performed at the Swiss spallation neutron source SINQ Paul Scherrer Institute, Villigen, Switzerland. This work was supported by the Russian Foundation for Basic Research (Projects No 13-02-00364 and 14-02-92104) and by the program of the Ural Branch of RAS (Project No 12-T-2-1012).
Number-of-Cited-References	40
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	34
Journal-ISO	J. Alloy. Compd.
Doc-Delivery-Number	AQ2XT