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Synthesis and magnetism of a Li2FeSiO4 single crystal

: Hergett, Waldemar; Jonak, Martin; Werner, Johannes; Billert, F.; Sauerland, Sven; Koo, Changhyun; Neef, Christoph; Klingeler, Rüdiger


Journal of magnetism and magnetic materials 477 (2019), S.1-3
ISSN: 0304-8853
Fraunhofer ISI ()
single crystal growth; high-pressure optical floating-zone technique; magnetisation; magnetostriction; low-dimensional magnetism

A macroscopic single crystal of gamma(II)-Li2FeSiO4 has been grown by means of the high-pressure optical floating-zone technique. Static magnetic susceptibility chi implies that the tetrahedrally-coordinated Fe2+ ions are in the high-spin, S = 2, state. While a sharp decrease in chi implies long-range antiferromagnetic order below T-N = 17.0(5) K, the presence of a broad maximum at T-m = 28 K suggests quasi-low-dimensional magnetism. Applying magnetic fields along the easy magnetic a-axis yields additional contributions to the susceptibility. partial derivative M/partial derivative B and magnetostriction for B > 7 T, and an anomaly at B approximate to 14.8 T.