Extra T-linear specific heat contribution induced by the f-d-exchange in Gd-Ni binary compounds / Baranov N. V.,Michor H.,Hilscher G.,Proshkin A.,Podlesnyak A. // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2008. - V. 20, l. 32.

ISSN/EISSN:

0953-8984 / 1361-648X

Type:

Article

Abstract:

Specific heat measurements performed for Gd-Ni binary compounds with 1: 2, 1: 1 and 3: 1 stoichiometry have revealed an additional contribution to the coefficient gamma of the T-linear term of the low-temperature specific heat in comparison with that obtained for isostructural paramagnetic counterparts R-Ni (R = Y, Lu, La). This extra contribution Delta gamma is found to grow linearly with increasing Gd concentration from nearly zero for GdNi5 up to Delta gamma approximate to 21.5 mJ g-at.(-1) K-2 for Gd3Ni. To explain the appearance of Delta gamma and its dependence on the strength of the f-d exchange interaction in Gd-rich binary compounds with Ni a new mechanism enhancing the effective mass of conduction electrons is suggested. The increased gamma value in Gd-containing compounds is attributed to spin fluctuations induced by the f-d exchange interaction in the hybridized 3d-5d electron subsystem.

Author keywords:

EARTH INTERMETALLIC COMPOUNDS; MAGNETIC PHASE-TRANSITIONS; RARE-EARTH; SPIN FLUCTUATIONS; NICKEL COMPOUNDS; CAPACITY; METALS; GADOLINIUM; YTTRIUM; ALLOYS

DOI:

10.1088/0953-8984/20/32/325233

Web of Science ID:

ISI:000257841400040

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG 13
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	325233
EISSN	1361-648X
Keywords-Plus	EARTH INTERMETALLIC COMPOUNDS; MAGNETIC PHASE-TRANSITIONS; RARE-EARTH; SPIN FLUCTUATIONS; NICKEL COMPOUNDS; CAPACITY; METALS; GADOLINIUM; YTTRIUM; ALLOYS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	nikolai.baranov@usu.ru
ResearcherID-Numbers	Podlesnyak, Andrey/A-5593-2013 Proshkin, Alexey/J-7180-2013 Baranov, Nikolai/J-5042-2013
ORCID-Numbers	Podlesnyak, Andrey/0000-0001-9366-6319 Proshkin, Alexey/0000-0002-2631-6834 Baranov, Nikolai/0000-0002-9720-5314 Michor, Herwig/0000-0003-1642-5946
Number-of-Cited-References	52
Usage-Count-Since-2013	14
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	329BH