Onset of magnetism in Y1-xGdxCo2: effect on the heat capacity and electrical resistivity / Baranov NV,Yermakov AA,Podlesnyak A // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2003. - V. 15, l. 31. - P. 5371-5382.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

Results of the electrical resistivity, magnetoresistance and specific heat measurements are presented for Y1-xGdxCo2 in the vicinity of the critical Gd concentration x(c) approximate to 0.15 for the onset of a long-range magnetic order. Pronounced maxima of the coefficient gamma of the T-linear specific heat, Debye temperature and residual resistivity as a function of concentration are found to exist at x = 0.1, i.e. just below x(c). These anomalies, together with the existence of a minimum on the temperature dependences of the electrical resistivity at 0 < x < 0.15, are ascribed to the substantial influence of localized spin density fluctuations induced by f-d exchange in the itinerant d-electron subsystem of Co. The maximal extra contribution to the residual resistivity Deltarho (max)(res) in Y1-xRxCo2 pseudobinaries is found to depend on the critical concentration as well as on the type of R ions, while the value of Deltagamma(max), depends only on the critical concentration of R ions. The significant upturns on C-P/T versus T-2 dependences observed in Y1-xGdxCo2 at 0 < x < 0.15 may be indicative of a non-Fermi-liquid behaviour of the d-electron subsystem caused by the partial substitution of Gd for Y.

Author keywords:

SPIN FLUCTUATIONS; PHASE-TRANSITION; STATE; CO; TEMPERATURE; MOMENT; GDXY1-XCO2; YCO2

DOI:

10.1088/0953-8984/15/31/304

Web of Science ID:

ISI:000185179800006

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG 13
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	PII S0953-8984(03)62253-8
Keywords-Plus	SPIN FLUCTUATIONS; PHASE-TRANSITION; STATE; CO; TEMPERATURE; MOMENT; GDXY1-XCO2; YCO2
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Podlesnyak, Andrey/A-5593-2013 Baranov, Nikolai/J-5042-2013
ORCID-Numbers	Podlesnyak, Andrey/0000-0001-9366-6319 Baranov, Nikolai/0000-0002-9720-5314
Number-of-Cited-References	36
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	17
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	719AB