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Low Temperature Magnetic Ordering in NdAgAl₃

100%

Nallamuthu S., Džubinská A., Reiffers M., Nagalakshmi R.

Acta Physica Polonica A

2017

vol. 131

issue 4

1015-1017

We present the detailed study of magnetic, thermodynamic, and transport properties of polycrystalline NdAgAl₃. The compound crystallizes in BaNiSn₃-type tetragonal structure with the space group I4mm. Magnetic, heat capacity and transport measurements indicate the possible antiferromagnetic nature of the ordering below 2 K. The compound shows the Schottky anomaly in heat capacity data. Magnetoresistance is negative at low temperature.

Characterization of New U-Ni-X₂ Splats and Study of their Physical Properties

64%

Molčanová Z., Mihalik M., Mihalik M., Reiffers M., Džubinská A., Huráková M., Kavečanský V., Paukov M., Havela L.

Acta Physica Polonica A

2017

vol. 131

issue 4

994-996

We explored the crystal structure, magnetic, and transport properties of UNiX₂ (X = Ge, Si) materials, which were prepared by a conventional metallurgical technique and by rapid solidification - splat cooling. The UNiSi₂ splat is mostly single phase, containing only small traces of a minority phase. Magnetic and electrical properties of the splat resemble properties of samples, which were prepared by conventional methods, exhibiting a ferromagnetic transition at about 91 K and similar temperature dependence of resistivity. The coercive field of μ₀H_c=4.25 T is much enhanced due to the magnetic anisotropy introduced by the sample preparation technique. The Barkhausen jumps were observed on the hysteresis loop. Magnetization of the sample does not saturate in fields up to μ₀H=9 T. The phase structure of UNiGe₂ splat is not completely solved and will be subject of our study in future. Our preliminary results indicate the presence of completely new phase with tetragonal crystal structure and antiferromagnetic ordering below 54 K.

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2 Acta Physica Polonica A

2 2017

2 Džubinská A.

2 Reiffers M.

1 Havela L.

1 Huráková M.

1 Kavečanský V.

1 Mihalik M.

1 Molčanová Z.

1 Nagalakshmi R.

1 Nallamuthu S.

1 Paukov M.

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Low Temperature Magnetic Ordering in NdAgAl₃

Characterization of New U-Ni-X₂ Splats and Study of their Physical Properties