Structure, transport and thermal properties of UCoGa

Abstract

Structure, transport and thermal properties of UCoGaPurwanto, A.; Robinson, R.A.; Prokes, K.; Nakotte, H.; de Boer, F.R.; Havela, L.; Sechovsky, V.; Tuan, N.C.; Kergadallan, Y.; Spirlet, J.C.; Rebizant, J. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 11 May 2018Structure, transport and thermal properties of By means of neutron powder diffraction, we find that UCoGa crystallizes in the hexagonal ZrNiAl structure and orders ferromagnetically at low temperatures with magnetic moments stacked along the c axis. The magnetic-ordering temperature is reflected in anomalies in the temperature dependencies of the electrical resistivity and the specific heat at Tc =47 K. Furthermore, the strong anisotropy in the electrical resistivity for illc and ilc indicates a significant contribution of the magnetic anisotropy to the electrical resistivity.

Magnetic Structure in UIrAl

“…Among the UTX compounds exhibiting similar hysteretic properties, both F and AF ground state were observed. The isostructural UPtAl [6] and UCoGa [7] are ferromagnets whereas UNiGa is an antiferromagnet [8]. For this reason, we checked the ground state of UIrAl by neutron diffraction experiment.…”

Extreme narrow magnetic domain walls in U ferromagnets: The UCoGa case

“…In this paper, we present the direct low-temperature investigation of a domain structure in a U 5felectron moment ferromagnet with TC << RT. UCoGa, a member of the family of UTX compounds with ZrNiAl-type of structure, has been selected as a typical U ferromagnet with huge uniaxial MA [20,[27][28][29][30] having the easy axis along the c-axis of the hexagonal structure. First, the UCoGa single a) b) crystal has been characterized by magnetization measurements in magnetic fields applied along the main crystallographic axes, a and c. The domain-structure imaging has been accomplished by using a low-temperature atomic force microscope -attoAFM/MFM Ixs (attocube).…”

“…In this paper, we present the direct low-temperature investigation of a domain structure in a U 5felectron moment ferromagnet with TC << RT. UCoGa, a member of the family of UTX compounds with ZrNiAl-type of structure, has been selected as a typical U ferromagnet with huge uniaxial MA [20,[27][28][29][30] having the easy axis along the c-axis of the hexagonal structure. First, the UCoGa single a) b)…”