Irreversible field-induced magnetic phase transitions and properties of Ho3CO / Baranov V,Goto T,Hilscher G,Markin PE,Michor H,Mushnikov NV,Park JG,Yermakov AA // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2005. - V. 17, l. 21. - P. 3445-3462.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

The results of magnetic susceptibility, magnetization, electrical resistivity and specific heat measurements performed on Ho3CO single crystals show that this compound exhibits two different antiferromagnetic structures: AF(II) at 8 K < T < 22 K and AF(I) below T-t approximate to 8K. Below the Neel temperature. T-N = 22 K the application of a magnetic field along the main crystallographic directions induces magnetic phase transitions which are accompanied by giant magnetoresistance. At T < Tt the field-induced phase transitions along the c- and b-axes are found to be irreversible, and a small ferromagnetic component is observed along the a-axis. These peculiarities are associated with the non-Kramers character of the Ho ion and with the presence of a complex incommensurate magnetic structure of Ho3Co below TN. The temperature coefficient of the electrical resistivity for Ho3Co above TN over a wide temperature range is found to differ from that observed for other R3CO compounds. Such a behaviour is attributed to the presence of an additional contribution to the conduction electron scattering by spin fluctuations induced by f-d exchange in the itinerant d-electron subsystem. The value of this extra contribution and its temperature range is suggested to depend on the spin value of the R ion. The excess of the effective magnetic moment per R ion, which is observed in Ho3CO and in other R3M type compounds, is also attributed to spin fluctuations induced by f-d exchange.

Author keywords:

LINEAR SPECIFIC-HEAT; RARE-EARTH-METALS; F-D EXCHANGE; SINGLE-CRYSTALS; TRANSPORT-PROPERTIES; SPIN FLUCTUATIONS; NEUTRON-DIFFRACTION; GADOLINIUM; ER3CO; DY3CO

DOI:

10.1088/0953-8984/17/21/034

Web of Science ID:

ISI:000230247000037

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 1
Publisher	IOP PUBLISHING LTD
Address	DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Language	English
Keywords-Plus	LINEAR SPECIFIC-HEAT; RARE-EARTH-METALS; F-D EXCHANGE; SINGLE-CRYSTALS; TRANSPORT-PROPERTIES; SPIN FLUCTUATIONS; NEUTRON-DIFFRACTION; GADOLINIUM; ER3CO; DY3CO
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Mushnikov, Nikolay/K-9076-2013 Park, Je Geun/K-8571-2013 Markin, Pavel/K-7088-2013
ORCID-Numbers	Mushnikov, Nikolay/0000-0002-6354-2558 Markin, Pavel/0000-0002-9537-2303 Michor, Herwig/0000-0003-1642-5946
Number-of-Cited-References	54
Usage-Count-Since-2013	13
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	941XH