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 7
- 1 September 1993
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 23 (7) , 511-515
- https://doi.org/10.1209/0295-5075/23/7/008
Abstract
Highly unusual magnetic ordering stabilised by nuclear 165Ho polarisation is found to exist below TN = 190 mK in HoBa2Cu3O7 by means of low-temperature neutron scattering experiments. The three-dimensional antiferromagnetic ordering corresponding to K = [0,1/2,1/2] is imperfect, due to finite correlation length ξc = 29 Å along the c=axis. The observed temperature dependence of the magnetic order parameter is in excellent agreement with mean-field calculations taking into account crystal field, exchange and hyperfine interactions.Keywords
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