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Properties of single crystalline AZn2Sb2 (A = Ca,Eu,Yb)
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Image of FIG. 1.
FIG. 1.

(Color online) Lattice parameters from refinements of powder neutron diffraction data reveal smooth expansion with c expanding more rapidly than a. An inset in the upper panel shows an image of the crystal structure, with unit cell outlined.

Image of FIG. 2.
FIG. 2.

Isotropic displacement parameters obtained from refinements of powder neutron diffraction data. The solid and dashed curves are obtained by fitting the displacement parameters of CaZn2Sb2 and YbZn2Sb2, respectively, using the Debye temperature as a free parameter for each element.

Image of FIG. 3.
FIG. 3.

Representative temperature dependence of the (a) electrical resistivity, (b) Hall carrier density, and (c) Hall mobility for the AZn2Sb2 single crystals; for each material, data are shown for two crystals, represented by closed and open symbols.

Image of FIG. 4.
FIG. 4.

Specific heat capacity for CaZn2Sb2, EuZn2Sb2, and YbZn2Sb2 with inset highlighting the transition in EuZn2Sb2 ∼ 13 K.

Image of FIG. 5.
FIG. 5.

(a) The antiferromagnetic transition near 13 K in EuZn2Sb2 is observed via the temperature dependence of M/H in moderate fields; the transition is suppressed at high fields. (b) Field dependence of the induced moment showing a saturation near the expected 7 μB /Eu below the AFM transition, while linear behavior consistent with paramagnetism is observed at higher temperatures.


Generic image for table
Table I.

Selected data from refinements of single crystal x-ray diffraction for CaZn2Sb2, EuZn2Sb2, and YbZn2Sb2 at 173 K; atomic coordinates of Zn and Sb are at (1/3,2/3,z) and Ca, Eu, and Yb are at (0,0,0).

Generic image for table
Table II.

Room temperature transport data for single crystalline samples compared to the literature for polycrystalline samples of CaZn2Sb2 and YbZn2Sb2 (Refs. 1 and 8), and EuZn2Sb2 (Ref. 2).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Properties of single crystalline AZn2Sb2 (A = Ca,Eu,Yb)