ACTA

Low Temperature Neutron and Synchrotron Diffraction Studies of KEr(MoO₄)₂ Single Crystal in External Magnetic Field

S. Maťaš^{a, b}, A. Orendáčová^c, K. Prokeš^a, R. Feyerherm^a, E. Dudzik^a, and B. Klemke^a
^aHelmholtz-Zentrum Berlin, Hahn Meitner Platz 1, D-14109 Berlin, Germany
^bInstitute of Experimental Physics SAS, Watsonova 47, SK-04001, Slovakia
^cP.J. Šafárik University, Park Angelinum 1, Košice, SK-04001, Slovakia

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We report on low temperature magnetic properties of KEr(MoO₄)₂ single crystal, which was investigated from 0.28 K to 30 K in magnetic fields up to 6.5 T. Neutron elastic data collected above and below transition temperature T_N ≈ 0.95 K suggest that an antiferromagnetic ordering establishes at low temperatures. The magnetic model within the A_xC_z mode assuming only magnetic moment at erbium atom positions is suggested. Synchrotron experiment in moderate magnetic fields at temperatures above T_N explains the origin of observed signal(s) at (0K0) reflection positions, K odd.

DOI: 10.12693/APhysPolA.118.897
PACS numbers: 75.50.-y, 28.20.Cz, 25.40.Dn