Author:
Svoboda Pavel,Javorský Pavel,Honda Fuminori,Sechovský Vladimír,Menovsky Alois
Abstract
AbstractThe tetragonal compound UNi2Si2 exhibits in zero magnetic field three different antiferromagnetic phases belowT N=124 K. They are formed by ferromagnetic basal planes, which are antiferromagnetically coupled along thec-axis with the propagation vectorq=(0, 0, q z). Two additional order-order magnetic phase transitions are observed below T N, namely atT 1=108 K and T 2=40 K in zero magnetic field. All three phases exhibit strong uniaxial anisotropy confining the U moments to a direction parallel to the c-axis. UNi2Si2 single crystals were studied in detail by measuring bulk thermodynamic properties, such as thermal expansion, resistivity, susceptibility, and specific heat. A microscopic study using neutron diffraction was performed in magnetic fields up to 14.5 T parallel to the c-axis, and a complex magnetic phase diagram has been determined. Here, we present the analysis of specific-heat data measured in magnetic fields up to 14 T compared with the results of the neutron-diffraction study and with other thermodynamic properties of UNi2Si2.
Subject
General Physics and Astronomy
Reference7 articles.
1. V. Sechovský and L. Havela: “Magnetism of ternary compounds of uranium”, In: K.H.J. Buschow (Ed.): Handbook of Magnetic Materials, Elsevier, Amsterdam, Vol. 11, (1998), pp. 1–289 and references therein.
2. H. Lin, L. Rebelsky, M.F. Collins, J.D. Garrett and W.J.L. Buyers: “Magnetic Structure of UNi2Si2”, Phys. Rev. B, Vol. 43, (1991), pp. 13232–13239.
3. L. Rebelsky, H. Lin, M.W. McElfresh, M.F. Collins, J.D. Garrett, W.J.L. Buyers and M.S. Torikachvili: “The Magnetic Phase Diagram of UNi2Si2”, Physica B, Vol. 180 & 181, (1992), pp. 43–45.
4. P. Svoboda, P. Javorský, V. Sechovský, A.A. Menovsky, M. Hofmann and N. Stuesser: “Magnetic phase diagram and critical scattering of UNi2Si2”, Physica B, Vol. 322, (2002), pp. 248–251.
5. P. Svoboda, P. Javorský, V. Sechovský, and A.A. Menovsky: “Magnetic phase diagram of UNi2Si2 in high fields”, Physica B, Vol. 276–278, (2000), pp. 686–687.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献