Abstract
The hexagonal high-pressure (HP) modification of NdPtSn was prepared under multianvil high-pressure (10.5 GPa) high-temperature (1425 K) conditions from the orthorhombic normal-pressure (NP) modification. NP- and HP-NdPtSn were studied by X-ray powder and single crystal diffraction: TiNiSi type, Pnma, a = 737.2 ( 1 ) , b = 460.0 ( 1 ) , c = 799.6 ( 2 ) pm , w R 2 = 0.0662 , 441 F 2 values, 20 variable parameters for NP-NdPtSn, and ZrNiAl type, P 6 2 ¯ m , a = 753.55 ( 5 ) , c = 410.55 ( 4 ) pm , w R 2 = 0.0709 , 248 F 2 values, 14 variable parameters for HP-NdPtSn. Temperature dependent susceptibility measurements reveal paramagnetism for HP-NdPtSn above 20 K with an experimental magnetic moment of 3.73(2) μ B / Nd mol and a paramagnetic Curie temperature θ P of − 5 ( 1 ) K. The low-temperature data indicate spin glass behavior with a freezing temperature around 4.5 K. The spin glass anomalies are also evident from specific heat measurements.
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