TY - JOUR
T1 - Structural disorder and elementary magnetic properties of triangular lattice ErMgGaO4 single crystals
AU - Cevallos, F. Alex
AU - Stolze, Karoline
AU - Cava, Robert J.
N1 - Funding Information:
This research was supported by the US Department of Energy, Division of Basic Energy Sciences , Grant No. DE-FG02-08ER46544 , and was performed under the auspices of the Institute for Quantum Matter.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/8
Y1 - 2018/8
N2 - 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. No sign of magnetic ordering is observed above 1.8 K, suggesting that ErMgGaO4 is a geometrically frustrated magnet.
AB - 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. No sign of magnetic ordering is observed above 1.8 K, suggesting that ErMgGaO4 is a geometrically frustrated magnet.
KW - A. Geometrically frustrated oxides
KW - C. Crystal structure and symmetry
UR - http://www.scopus.com/inward/record.url?scp=85044611662&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85044611662&partnerID=8YFLogxK
U2 - 10.1016/j.ssc.2018.03.015
DO - 10.1016/j.ssc.2018.03.015
M3 - Article
AN - SCOPUS:85044611662
SN - 0038-1098
VL - 276
SP - 5
EP - 8
JO - Solid State Communications
JF - Solid State Communications
ER -