6533b7ddfe1ef96bd127406e
RESEARCH PRODUCT
Ferromagnetic ordering in GdPdCd
Claudia FelserRainer PoettgenRolf-dieter HoffmannThomas FickenscherRoman KmiećKazimierz Latkasubject
band structure calculationscrystal structureCurie–Weiss lawCondensed matter physicsMagnetic momentMagnetismChemistryGeneral MedicineGeneral ChemistryCondensed Matter PhysicsMagnetic susceptibilityFerromagnetismmagnetism^{155}Gd Mössbauer spectroscopyCurie temperatureGeneral Materials Sciencegadoliniumintermetallic compoundHyperfine structureElectric field gradientdescription
Abstract GdPdCd was obtained in pure form via reaction of the elements in a sealed tantalum tube in a high-frequency furnace. The structure was investigated by X-ray diffraction on both powders and single crystals: ZrNiAl type, P 6 2m , a=758.2(1), c=391.78(7) pm, wR2=0.0410 for 358 F2 values and 14 variables. Striking structural motifs of GdPdCd are two types of palladium-centered tricapped trigonal prisms [Pd1Cd3Gd6] and [Pd2Cd6Gd3]. Together the palladium and cadmium atoms build a three-dimensional network in which the gadolinium atoms fill distorted pentagonal channels. Susceptibility measurements reveal Curie–Weiss behaviour with an effective magnetic moment of 8.2(1) μB/Gd. GdPdCd orders ferromagnetically at TC=62.5(5) K and shows a saturation magnetization of 7.3(1) μB/Gd at 4.2 K and 5 T. The thermal variations of hyperfine parameters in GdPdCd were measured over the temperature range from 4.2 to 67 K using 155Gd Mossbauer spectroscopy. The change of the electric field gradient below the Curie temperature TC is interpreted by an anomalous thermal expansion associated with magnetostrictive strains. The electronic and magnetic properties of GdPdCd were investigated by Tb-lmto-asa band structure calculations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-05-20 | Solid State Sciences |