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Magnetic Properties of Dysprosium Oxisulphate (Dy 2 O 2 SO 4 )
Author(s) -
Hülsing H.,
Kasten A.
Publication year - 1983
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221180229
Subject(s) - ferrimagnetism , condensed matter physics , magnetization , antiferromagnetism , dysprosium , zeeman effect , ising model , phase diagram , saturation (graph theory) , materials science , magnetic hysteresis , hysteresis , phase (matter) , magnetic field , physics , mathematics , quantum mechanics , combinatorics , nuclear physics
Below T N = (8.05 ± 0.10) K Dy 2 O 2 SO 4 is a nearly two‐dimensional co‐linear Ising antiferromagnet. At low temperatures ( T ≦ 2.4 K) and in external magnetic fields between 1.7 and 2.2 T along the ordering direction there is an intermediate ferrimagnetic phase with a T = 0 magnetization of 1/3 of the saturation value. From Zeeman spectroscopy and theoretical considerations the structure of the magnetic phases are derived. The details of the phase diagram as established by magnetization measurements are not reproduced by mean field calculations. At the boundary between the antiferromagnetic and ferrimagnetic phase there is a hysteresis which is asymmetric with respect to the sweep direction of the external magnetic field. This behaviour can be explained by the occurrence of different magnetization processes. The time constants as determined experimentally are of the order of ten minutes.