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Thermopower Monitoring of Relaxation and Devitrification in Fe-Based Glassy Alloys

100%
Lovas A., Kravcak J., Szabó A.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 1
78-79
EN
The change of thermopower is investigated in Fe-based glassy alloys during structural relaxation and amorphous-crystalline transformation. It was found, that thermopower shifts to negative direction until solely the relaxation proceeds. This negative shift is composition independent. The net shape of thermopower curves is composed from the thermopower of the individual constituent crystalline phases after the crystallization process.
2
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Magnetic and Structural Characterization of NiXSb (X = Mn, Cr) Heusler Ribbon

76%
Ryba T., Vargova Z., Ilkovic S., Reiffers M., Kravcak J., Gyepes R., Varga R.
Acta Physica Polonica A
|
2017
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vol. 131
|
issue 4
857-859
EN
Half-Heusler alloys with composition NiMnSb and NiCrSb have been prepared by rapid-quenching method. NiMnSb half-Heusler alloy is characterized by single phase C1_{b} with polycrystalline structure while crystalline structure of NiCrSb shows multiphase system. Magnetic measurements indicated high anisotropy and easy magnetization direction in the parallel direction with respect to ribbon axis for NiMnSb alloy while paramagnetic behavior appears for NiCrSb alloy down to 50 K.
3
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Structural and Magnetic Characterization of NiMnSb Half-Heusler Alloy Prepared by Rapid Quenching

64%
Ryba T., Vargova Z., Varga R., Ilkovic S., Reiffers M., Haskova V., Szabo P., Kravcak J., Gyepes R.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 1
206-207
EN
NiMnSb half-Heusler alloy in the form of a rod has been prepared by rapid quenching (suction-casting) method. The rod is characterized by single phase C1_b crystalline structure with lattice parameter a=5.982 Å. Magnetic measurements reveal an isotropic character of bulk NiMnSb alloy. Our study shows relatively high spin polarization of bulk NiMnSb in the range 35-50%.
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