Structural disorder and elementary magnetic properties of triangular lattice ErMgGaO4 single crystals

Cevallos, F. Alex; Stolze, Karoline; Cava, Robert J.

doi:10.1016/j.ssc.2018.03.015

Title: Structural disorder and elementary magnetic properties of triangular lattice ErMgGaO₄ single crystals

Journal Article · Fri Mar 23 00:00:00 EDT 2018 · Solid State Communications

DOI:https://doi.org/10.1016/j.ssc.2018.03.015· OSTI ID:1441197

Cevallos, F. Alex ^[1]; Stolze, Karoline ^[1]; Cava, Robert J. ^[1]

Princeton Univ., Princeton, NJ (United States)

The single crystal growth, structure, and basic magnetic properties of ErMgGaO₄ are reported. The structure consists of triangular layers of magnetic ErO₆ octahedra separated by a double layer of randomly occupied non-magnetic (Ga,Mg)O₅ bipyramids. The Er atoms are positionally disordered. Magnetic measurements parallel and perpendicular to the c axis of a single crystal reveal dominantly antiferromagnetic interactions, with a small degree of magnetic anisotropy. A weighted average of the directional data suggests an antiferromagnetic Curie Weiss temperature of approximately -30 K. Below 10 K the temperature dependences of the inverse susceptibilities in the in-plane and perpendicular-to plane directions are parallel, indicative of an isotropic magnetic moment at low temperatures. In conclusion, no sign of magnetic ordering is observed above 1.8 K, suggesting that ErMgGaO₄ is a geometrically frustrated magnet.

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Research Organization:: Princeton Univ., NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: FG02-08ER46544

OSTI ID:: 1441197

Journal Information:: Solid State Communications, Vol. 276, Issue C; ISSN 0038-1098

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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