Enhanced survival of short-range magnetic correlations and frustrated interactions in R3T intermetallics / Baranov N. V.,Proshkin A. V.,Gubkin A. F.,Cervellino A.,Michor H.,Hilscher G.,Gerasimov E. G.,Ehlers G.,Frontzek M.,Podlesnyak A. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2012. - V. 324, l. 11. - P. 1907-1912.

ISSN/EISSN:
0304-8853 / 1873-4766
Type:
Article
Abstract:
Elastic and inelastic neutron scattering and magnetization measurements have been used to study peculiarities of the magnetic state in R3T compounds (R=Gd, Er, Tb; T=Ni, Co) below and above magnetic ordering temperatures. A pronounced non-Brillouin shape of the magnetization curves observed in the antiferromagnetic compounds Gd3Ni and Tb3Ni above their magnetic ordering temperatures together with earlier reported data about the retention of the magnetic contribution to the total specific heat of Gd3T and anomalous behavior of the electrical resistivity above magnetic ordering temperatures are ascribed to the existence of short-range magnetic correlations in the wide temperature range in the paramagnetic state. The persistence of short-range magnetic order up to temperatures greater than 5-6 times the Neel temperature has been revealed by powder neutron diffraction measurements performed for Tb3Ni and Tb3Co. On the other hand, results from inelastic neutron scattering show that the low temperature magnetic excitations are strongly suppressed in both Tb3Co and Er3Co. It is suggested that the extended short-range magnetic correlations, which turn out to be an inherent feature of R3T type compounds, are due to the layered crystal structure and to the difference between geometrically frustrated intra-layer exchange interactions and inter-layer exchange. (C) 2012 Elsevier B.V. All rights reserved.
Author keywords:
Intermetallic; Magnetic property; Neutron diffraction and scattering F-D EXCHANGE; SPIN FLUCTUATIONS; ELECTRICAL-RESISTIVITY; PHASE-TRANSITIONS; SINGLE-CRYSTAL; GD3CO; GD3NI; HEAT; ORDER; R3NI
DOI:
10.1016/j.jmmm.2012.01.021
Web of Science ID:
ISI:000300789600008
Соавторы в МНС:
Другие поля
Поле Значение
Month JUN
Publisher ELSEVIER SCIENCE BV
Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language English
EISSN 1873-4766
Keywords-Plus F-D EXCHANGE; SPIN FLUCTUATIONS; ELECTRICAL-RESISTIVITY; PHASE-TRANSITIONS; SINGLE-CRYSTAL; GD3CO; GD3NI; HEAT; ORDER; R3NI
Research-Areas Materials Science; Physics
Web-of-Science-Categories Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email nikolai.baranov@usu.ru
ResearcherID-Numbers Ehlers, Georg/B-5412-2008 Baranov, Nikolai/J-5042-2013 Gerasimov, Evgeny/J-3599-2013 Gubkin, Andrey/J-3240-2013 Podlesnyak, Andrey/A-5593-2013 Proshkin, Alexey/J-7180-2013 Frontzek, Matthias/C-5146-2012 Cervellino, Antonio/C-3007-2012 Instrument, CNCS/B-4599-2012
ORCID-Numbers Ehlers, Georg/0000-0003-3513-508X Baranov, Nikolai/0000-0002-9720-5314 Gerasimov, Evgeny/0000-0002-1975-705X Gubkin, Andrey/0000-0002-4280-7561 Podlesnyak, Andrey/0000-0001-9366-6319 Proshkin, Alexey/0000-0002-2631-6834 Frontzek, Matthias/0000-0001-8704-8928 Cervellino, Antonio/0000-0002-9086-2717 Michor, Herwig/0000-0003-1642-5946
Funding-Acknowledgement Swiss National Science Foundation {[}IB7420-110849]; RAS {[}12-T-2-1012]; Ministry of Education and Science of the Russian Federation {[}16.518.11.7032]; Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy; U.S. Department of Energy {[}DE-AC05-00OR22725]
Funding-Text This work was supported by Swiss National Science Foundation (Project no IB7420-110849), by the program of RAS (project 12-T-2-1012) and by the Ministry of Education and Science of the Russian Federation (Contract 16.518.11.7032). The research at Oak Ridge National Laboratory's Spallation Neutron Source was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. ORNL is managed by UT-Battelle, LLC, under Contract DE-AC05-00OR22725 for the U.S. Department of Energy.
Number-of-Cited-References 39
Usage-Count-Last-180-days 1
Usage-Count-Since-2013 26
Journal-ISO J. Magn. Magn. Mater.
Doc-Delivery-Number 899CC