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Electron Transport and Point Contact Spectroscopy of Cubic DyCu_{5}

100%

Nenkov K., Idzikowski B., Ilkovic S., Kačmarčiková E., Reiffers M., Müller K.

Acta Physica Polonica A

2000

vol. 97

issue 5

843-846

The electron transport properties and point contact spectra of melt-spun DyCu_{5} with the cubic phase (structure type AuBe_{5}, space group $F\overline{4}3m$) were investigated. It was found by ac-susceptibility measurements that below a transition temperature T_{m}=6.5 K this phase shows metamagnetism. Between T_{m} and T_{C}=14.5 K a spontaneous magnetization is found. Our measurements of electrical resistivity confirm the existence of two magnetic phase transitions in the compound. Furthermore, we present point contact spectra of DyCu_{5}-Cu heterocontacts which are directly proportional to the electron-quasiparticle interaction function. Apart from a peak at about 18 meV, which is characteristic of electron-phonon interaction in pure Cu, we observed a series of additional maxima at lower energy, which are connected with the allowed 4f-transitions from the ground state to excited crystalline electric field levels.

Magnetic and Structural Characterization of NiXSb (X = Mn, Cr) Heusler Ribbon

100%

Ryba T., Vargova Z., Ilkovic S., Reiffers M., Kravcak J., Gyepes R., Varga R.

Acta Physica Polonica A

2017

vol. 131

issue 4

857-859

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.

Structural and Magnetic Characterization of NiMnSb Half-Heusler Alloy Prepared by Rapid Quenching

84%

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

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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3 Acta Physica Polonica A

1 2017

1 2014

1 2000

3 Ilkovic S.

3 Reiffers M.

2 Gyepes R.

2 Kravcak J.

2 Ryba T.

2 Varga R.

2 Vargova Z.

1 Haskova V.

1 Idzikowski B.

1 Kačmarčiková E.

1 Müller K.

1 Nenkov K.

1 Szabo P.

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Electron Transport and Point Contact Spectroscopy of Cubic DyCu_{5}

Magnetic and Structural Characterization of NiXSb (X = Mn, Cr) Heusler Ribbon

Structural and Magnetic Characterization of NiMnSb Half-Heusler Alloy Prepared by Rapid Quenching