•F. Weber1, A. Cosceev1, A. Nateprov1,2,
M. Uhlarz1, C. Pfleiderer1 und H. v. Löhneysen1,3
1Physikalisches Institut, Universität Karlsruhe, D-76128 Karlsuhe, Germany
2Institute of Applied Physics, Academei 5, MD-2028 Kishinev, Moldova
3Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany
We report the synthesis and characterisation of a new ternary Europium
pnictide EuZn2Sb2. Single crystals were grown by
a solid state reaction of high-purity starting materials in carbon glass
crucibles. The crystal structure was determined using powder x-ray diffraction.
Single crystals were oriented using Laue x-ray diffraction. EuZn2Sb2
is isostructural with the hexagonal Yb compound YbZn2Sb2.
The bulk properties were characterised in terms of measurements of the
resistivity, magnetoresistance, Hall effect, specific heat and magnetisation.
Pronounced features characteristic of antiferromagnetic order with TN
= 13.3 K are observed. For field parallel to the c-axis the antiferromagnetism
is suppressed above 2.7 T while it persists up to ~
4.7 T for field in the basal plane. An analysis of the nature of
the antiferromagnetic state as inferred from the bulk properties is presented.