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1
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Magnetic Properties of Tb_{1 - x}Y_{x} NiIn System

100%
Zarzycki A., Szytuła A.
Acta Physica Polonica A
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2012
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vol. 122
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issue 2
382-383
EN
Polycrystalline samples of Tb_{1 - x}Y_{x}NiIn (x = 0.2 and 0.4) were prepared and studied by powder X-ray diffraction and AC and DC magnetic measurements. The compounds crystallize in the hexagonal ZrNiAl-type structure. At low temperatures the ferromagnetic properties are detected. With increasing Y content a change in the magnetic properties, decrease of the Curie temperatures and magnetic moment in the ordered state are observed.
2
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Magnetic Properties of Ho_{5}Ni_{2}In_{4}

81%
Tyvanchuk Y., Penc B., Szytuła A., Zarzycki A.
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issue 4
599-600
EN
X-ray diffraction and magnetic measurements of Ho_{5}Ni_{2}In_{4} are reported. This compound crystallizes in the orthorhombic Lu_{5}Ni_{2}In_{4}-type structure. Magnetic data indicate ferromagnetic properties below T_c = 30 K.
3
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Magnetic Properties RNi_5Sn (R = Pr, Nd) Compounds

71%
Tyvanchuk Y., Romaka L., Szytuła A., Duraj R., Zarzycki A.
Acta Physica Polonica A
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2013
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vol. 123
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issue 1
145-147
EN
X-ray diffraction and magnetic measurements of RNi_5Sn (R = Pr, Nd) compounds are reported. These compounds crystallize in the hexagonal CeNi_5Sn-type structure. Magnetic data indicate that both compounds are antiferromagnet with the Néel temperatures T_{N} equal to 24 K (R = Pr) and 8.8 K (R = Nd). The magnetic data below T_{N} suggest the complex magnetic order.
4
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Optical Diffraction Strain Sensor Prepared by Interference Lithography

62%
Zabila Y., Horeglad P., Krupiński M., Zarzycki A., Perzanowski M., Maximenko A., Marszałek M.
Acta Physica Polonica A
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2018
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vol. 133
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issue 2
309-312
EN
An optical strain sensor was developed for use in stretchable electronics. It consists of a diffraction grating formed directly on the examined surface illuminated by a laser beam which creates interference pattern. This pattern can then be used to determine axial and lateral strains for a uniaxial stress states. Direct laser interference patterning was employed as a fast processing tool for the preparation of micro- and sub-microgratings. Two coherent beams of Nd:YAG laser with 532 nm wavelength and pulse duration of 10 ns were used to selectively remove material from the irradiated sample surface. This technique creates periodic pattern on the metallized surface of polymeric substrates. New sensors formed by direct laser interference patterning method were able to resolve higher order diffraction maxima, which would be of benefit for strain measurement application. Experimental setup for tensile tests was composed of laser probe, the sensor element, and CCD camera. To extract strain values, we analysed acquired interference pattern images in real time software, developed with LabVIEW environment. This kind of contactless strain sensor is suitable for examination of stretchable electronics component for which conventional tensile tests are either not acceptable or can interfere with its normal operation.
5
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Magnetic Structure of RCuIn (R = Nd, Tb, Ho, Er)

52%
Szytuła A., Baran S., Jaworska-Gołąb T., Penc B., Zarzycki A., Stűsser N., Arulraj A., Tyvanchuk Y.
Acta Physica Polonica A
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2008
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vol. 113
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issue 4
1185-1192
EN
Magnetic and neutron diffraction measurements of RCuIn (R = Nd, Tb, Ho, Er) are reported. The compounds crystallize in the hexagonal ZrNiAl-type structure. The ZrNiAl lattice originates from a distortion of a kagomélattice. The studied compounds are antiferromagnets with the Néel temperature equal to 4.9 K for R = Nd, 14.5 K for R = Tb, 4.5 K for R = Ho and 3.5 K for R = Er. The magnetic ordering is described by the propagation vectorwe k = (1/2, 1/2, k_z) with k_z equal to 0.161(6) for R = Nd, 0.2213(5) for R = Tb, 0.2510(3) for R = Ho and 0 for R = Er. The magnetic structure is noncollinear with magnetic moments in the basal plane for R = Nd, Tb and Ho and collinear with magnetic moments parallel to the c-axis for R = Er. The observed magnetic ordering results from the competition between exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type, the geometrical frustration of the rare-earth magnetic moments and the influence of the crystal electric field. The latter affects the direction of magnetic moments and is responsible for the magnetic crystalline anisotropy.
6
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Magnetic Properties of the Nanocrystalline DyMnO_{3} Compound

52%
Dyakonov V., Szytuła A., Baran S., Kravchenko Z., Zubov E., Iessenchuk O., Bazela W., Dul M., Zarzycki A., Szymczak H.
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issue 4
607-610
EN
We report on the X-ray powder diffraction and magnetic measurements of the polycrystalline and the two nanocrystalline samples of DyMnO_{3} compound synthesized at temperatures of 800 and 850°C. All samples at room temperature crystallize in the orthorhombic crystal structure (space group Pnma). The crystal structure parameters determined change only slightly with preparation methods but the average grains size of the nanoparticles determined from X-ray data increases significantly with increasing annealing temperature. Temperature dependence of the magnetic susceptibility indicates the antiferromagnetic order in Dy sublattice at low temperatures.
7
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Influence of Cu Layer Thickness on Morphology and Magnetic Properties of Co/Cu Nanowires

52%
Kac M., Kopec M., Cieniek L., Zarzycki A., Kac S., Maximenko A., Dutkiewicz E., Marszalek M.
Acta Physica Polonica A
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2018
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vol. 133
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issue 2
302-305
EN
We studied changes of morphology and magnetic properties of Co/Cu multilayered nanowires, electrodeposited in polycarbonate membranes, as a function of Cu layer thickness. The morphology and structure of wire assemblies with an average diameter of 200 nm and length of 10 μ m, investigated by X-ray diffraction and scanning electron microscopy techniques, revealed polycrystalline structure of Cu and Co layers with smooth lateral surface of nanowires. Overdeposited nanowires created caps which showed flower-like dendrites with shape changing as a function of Cu thickness and electrodeposition parameters. Chemical composition of Co and Cu nanowires analysed by energy dispersive spectroscopy and proton induced X-ray emission showed Cu nanowires free from Co atoms while in Co nanowires, Cu contamination with concentration below 10% was observed. The oxidation traces observed in single-component Cu nanowires did not appear in multilayered nanowires. Magnetic measurements indicated easy axis of magnetization in membrane plane for nanowires with Cu thickness smaller than 20 nm, whereas for larger Cu thicknesses isotropic orientation of magnetization was observed. The presence of Cu atoms in single-component Co nanowires resulted in the appearance of magnetic anisotropy with easy axis along nanowire axis and the increase of coercivity value.
8
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Influence of the Grain Size on the Magnetic Properties of TbMnO_{3}

42%
Bażela W., Dul M., Dyakonov V., Gondek Ł., Hoser A., Hoffmann J., Penc B., Szytuła A., Kravchenko Z., Nosalev I., Zarzycki A.
Acta Physica Polonica A
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2012
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vol. 121
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issue 4
785-788
EN
The magnetic properties including magnetic structure of poly and nano samples of TbMnO_{3} are determined. All the samples investigated are antiferromagnets. In these samples the Mn ad Tb moments order antiferromagnetically at different temperatures and form modulated magnetic structure described by the propagation vector k=(k_{x},0,0) with different value of k_{x} for the Mn and Tb sublattices. Comparison of the data for poly and nano samples indicates the decrease of the moment and increase of the k_{x} component of propagation vector in the nano specimens. The wide Bragg peak related to the Tb sublattice suggests that the magnetic order has the claster-like character. The magnetic moments value in both sublattices is smaller, whereas the k_{x} values are larger for nano samples.
9
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Investigation of Sediments Causing Damage to Water Meters in a Large Drinking Water Distribution System

42%
Kopeć M., Roman M., Kąc M., Budziak A., Paluszkiewicz C., Zarzycki A., Kąc S., Dutkiewicz E., Cichoń T., Bochnia T., Kwiatek W.
Acta Physica Polonica A
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2018
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vol. 133
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issue 2
296-301
EN
Preliminary studies on the sediments collected from water meters of Krakow water supply system were performed in the cooperation with the Municipal Water Supply and Sewage. Creation and deposition of sediments on the measuring devices installed in the water supply system is a serious technological and economical problem for water companies, defectively operating for this reason water meters must be replaced. It is evident that knowledge of the chemical and phase composition of sediments is an important step towards resolving the problem of impurities in water supply systems. Four different samples of sediments, coming from water meters, were investigated using the proton-induced X-ray emission, the X-ray diffraction, the Fourier transform infrared and Raman spectroscopy. The X-ray methods revealed presence of amorphous and fine-crystalline phases as well as high content of iron-based compounds. As a crystalline phase, the most frequently appeared: goethite, lepidocrocite, iron oxides (hematite, maghemite, magnetite), calcium carbonate, and quartz. In one of the samples, the nanocrystalline phase was found and identified as hydrous iron oxyhydroxide ferrihydrite. Vibrational spectroscopy methods confirmed the composition of crystalline phases as well as enabled to estimate the abundance of amorphous phase in samples.
10
Content available remote

Magnetic and Neutron Diffraction Studies of the Polycrystalline and Nanoparticle TbMnO_3

42%
Bażela W., Dul M., Dyakonov V., Gondek Ł., Hoser A., Hoffmann J., Penc B., Szytuła A., Kravchenko Z., Nosalev I., Zarzycki A.
Acta Physica Polonica A
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2012
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vol. 122
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issue 2
384-390
EN
This paper reports on investigations of magnetic properties, crystal and magnetic structures on TbMnO_3 prepared in various ways, namely, as conventional polycrystalline sample and two nano particle specimens (synthesized with a sol-gel method at temperatures of 800 and 850°C). The X-ray and neutron diffraction data confirm the orthorhombic crystal structure (space group Pbnm, No. 62) without noticeable differences of the lattice parameters for poly- and nanocompounds. For the polycrystalline sample, a subsequent ordering of the Mn and Tb sublattices with decreasing temperature was observed. Namely, the Mn sublattice exhibits a modulated magnetic structure with the propagation vector k = (0, k_{x}, 0) in between 41-5 K. Below T = 21 K, a change from a collinear (A_{y} mode) into non-collinear (A_{y}G_{z} mode) structure was evidenced. Further decreasing of temperature below 10 K results in magnetic ordering of the Tb sublattice (modulated G_{x}A_{y}F_{z} mode). For nanoparticle compounds, magnetic ordering in the Mn and Tb sublattices is described by propagation vector k = (0, k_{y}, 0), with k_{y} components higher than observed for polycrystalline sample. The magnetic ordering in the Mn sublattice is described by a collinear A_{y} mode down to 1.6 K where the Tb moment becomes ordered (G_{x}A_{y} mode). The observed broadening of the Bragg peaks connected to the Tb sublattice suggests the cluster-like character of its magnetic structure.
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