Antiferromagnetic ordering and crystal-field splittings of the Ho3+ions in HoBa2Cu4O8
- 30 May 1994
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 6 (22) , 4147-4152
- https://doi.org/10.1088/0953-8984/6/22/014
Abstract
The antiferromagnetic structure of the high-temperature superconductor HoBa2Cu4O8 with Tc=77 K was determined by means of neutron diffraction at T=9 mK. Imperfect three-dimensional antiferromagnetic ordering of the Ho3+ ions corresponding to propagation vector K=(0, 1/2 , 0) is found below TN=100 mK with magnetic moments of magnitude 1.5 mu B at saturation and oriented parallel to the a-axis. The antiferromagnetic sublattice is characterized by stacking faults corresponding to a finite correlation length xi c=18 AA along the c-axis. The majority of the 17 crystal-field level within the ground-state J-multiplet of the Ho3+ ions is established by inelastic neutron scattering, which allowed an unambiguous determination of the nine assignable crystal-field parameters. The observed temperature dependence of the order parameter is found to be in excellent agreement with mean-field calculations including crystal-field, exchange and hyperfine interactions.Keywords
This publication has 12 references indexed in Scilit:
- Combined Electronic-Nuclear Magnetic Ordering of the Ho 3+ Ions and Magnetic Stacking Faults in the High- T c Superconductor HoBa 2 Cu 3 O 7Europhysics Letters, 1993
- Crystal-field splitting and temperature dependence of two-dimensional antiferromagnetism in the high-Tc compound DyBa2Cu4O8Zeitschrift für Physik B Condensed Matter, 1993
- Neutron diffraction investigation of structures of ‘RE124’ (RE = Dy, Ho, Er) and ‘Nd247’ superconductors; 2D antiferromagnetism in ‘Dy124’Physica B: Condensed Matter, 1992
- Two- and three-dimensional magnetic order of the rare-earth ions in RPhysical Review B, 1990
- Neutron diffraction determination of magnetic order in holmium trifluoride, HoF3Journal of Physics: Condensed Matter, 1990
- MINREF – a new computer program for neutron refinement of incommensurate multiphase nuclear and magnetic structuresJournal of Applied Crystallography, 1990
- Neutron spectroscopic determination of the crystalline electric field inPhysical Review B, 1988
- 21. Nuclear MagnetismMethods in Experimental Physics, 1987
- Use of neutron diffraction for the study of domains in nuclear magnetic orderingJournal de Physique, 1980
- Dirac-Fock studies of some electronic properties of rare-earth ionsJournal of Magnetism and Magnetic Materials, 1979