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1
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Czochralski Method for Crystal Growth οf Reactive Intermetallics

100%
Talik E., Oboz M.
Acta Physica Polonica A
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2013
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vol. 124
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issue 2
340-343
EN
Czochralski method of crystallization allows obtaining single crystals of many intermetallic compounds. New series Gd_7Ni_xPd_{3-x} (x=2, 3) intermetallics was grown by the modified Czochralski method using a levitated melt in protective argon atmosphere. Preliminary studies of magnetic properties have shown that all crystals of the series order ferromagnetically. It was found that Gd_7Ni_2Pd shows magnetic transition to the ferromagnetic state at 225 K while Gd_7Ni_3 orders at 145 K.
2
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Mössbauer Investigations and Photoemission Studies of the Fe 3s Spin Splitting in Some Fe-Ni Alloys

81%
Kądziołka-Gaweł M., Zarek W., Talik E., Popiel E.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1493-1500
EN
The magnetic properties, crystal and electronic structure for Fe_{1-x}Ni_x (x=0.30, 0.325, 0.375) alloys and austenitic steel were studied using magnetostatic, Mössbauer effect methods, X-ray diffraction and X-ray photoelectron spectroscopy. The compositions of the investigated Fe-Ni alloys were chosen like that to exist on left, right and in inside of invar range. Two different magnetic moments (low and high) of Fe atom were observed. Measurement results do not show antiferromagnetic order in Fe-Ni alloys.
3
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Influence of Yttrium Substitution οn the Electronic Structure and Magnetic Moment οf Gd_{7-x}Y_{x}Pd_{3} (x = 0, 1, 2, 3, 4)

81%
Klimczak M., Talik E., Tran V.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
200-202
EN
The electronic structure and magnetic properties of Gd_{7-x}Y_{x}Pd_{3} (x = 0, 1, 2, 4) single crystals were examined. These compounds crystallized in the same crystal structure type (Th_{7}Fe_{3}) with the same c/a ratio of 0.63. A strongly anisotropic behavior of the magnetic and transport properties was found. Magnetic frustration and spin fluctuations on the palladium atoms are responsible for the complex magnetic properties of this ternary compound. As a part of current research we presented further characteristic of the Gd_{7-x}Y_{x}Pd_{3} (x = 0, 1, 2, 4) single crystal.
4
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Studies of the Bacterial Surfaces by XPS and SEM Methods

81%
Płoszaj-Pyrek J., Talik E., Piotrowska-Seget Z.
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vol. 125
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issue 4
929-931
EN
This work presents the results of studies on bacteria Bacillus subtilis which was grown at different temperatures. The experiments were carried out using X-ray photoelectron spectroscopy and scanning electron microscope equipped with "cryo-chamber", which gives the possibility of testing biological samples in a frozen state. These methods enabled receiving images of surface topography of the bacteria and demarcated their chemical composition. After deconvolution of the lines C 1s and O 1s information concerning the intensity of the various functional groups in the bindings presented in the cell walls surface of tested strain and reallocation in relation to the temperature of incubation was obtained. These changes are visible in the form of an additional peak in both the C 1s and O 1s in bacteria cultured in suboptimum temperature.
5
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Magnetic Moments' Arrangement in Fe Layers Deposited from Acetone Based Electrolyte

71%
Olszewski W., Szymański K., Satuła D., Biernacka M., Talik E.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6
1631-1640
EN
The acetone based electrolyte was used for electrodeposition of iron layers on the copper substrate. Two types of surfaces of the deposited layer can be obtained: shiny or black. Magnetic properties of the near-surface regions were studied by the conversion electron Mössbauer spectroscopy. The conversion electron Mössbauer spectra revealed apparent dependence of magnetic moments' arrangement on the deposition time. Those results were compared with the magnetization measurements. Composition of black coating was examined by the X-ray photoelectron spectroscopy measurements.
6
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Size Effect of Hard Magnetic Properties of Fe-Nb-B-Tb Milled Alloys

71%
Granek K., Ziółkowski G., Chrobak A., Klimontko J., Talik E.
Acta Physica Polonica A
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2018
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vol. 133
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issue 3
645-647
EN
The paper refers to magnetic and structural properties of powders made of Fe-Nb-B-Tb ultra-high coercive alloy. The initial alloy was milled in a low energy mill for 1 h and 14 h. With increasing milling time we observed gradual deterioration of hard magnetic properties i.e. the coercive field decreases from 5.51 T to 0.14 T for the bulk alloy and 14 h milled powder, respectively. However, for the 1 h milling time the micrometric powder reveals quite high coercivity of 2.77 T which is promising for possible applications in magnetic composites.
7
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Electronic Structure of Y_{3}Al_{5}O_{12}:V Single Crystals, Comparison with Sintered Ceramics

61%
Kruczek M., Talik E., Kusz J., Sakowska H., Świrkowicz M., Węglarz H.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
209-212
EN
Y_{3}Al_{5}O_{12} (YAG) single crystals doped with vanadium ions (V^{3+}) were obtained by the Czochralski method. The X-ray photoelectron spectra of YAG:V annealed in reducing atmospheres: H_{2}, vacuum and H_{2} + vacuum are presented and compared with the spectra of the YAG ceramics. The X-ray photoelectron spectra showed that the vanadium dopant concentration in YAG:V crystals is lower than a nominal one. For the "as grown" YAG:2.8at.%V crystal vanadium exists in the mixed valence state. The increase in lattice parameters for the samples annealed in hydrogen was found.
8
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On the Crystal and Magnetic Behavior οf ScFe_{4}Al_{8} Single Crystal

61%
Rećko K., Dobrzyński L., Lemée-Cailleau M., Waliszewski J., Talik E., Suski W., Courtois P.
Acta Physica Polonica A
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2009
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vol. 115
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issue 1
206-208
EN
Nuclear and magnetic properties of the ScFe_{4}Al_{8} single crystal were found to exhibit unparalleled complexity of nuclear and magnetic structures. Our previous neutron measurements revealed presence of two modulation vectors, both along [ε, ε, 0], however with different critical temperatures. Recent experiments forced us to revise our knowledge of the structural ordering in the sample. So far, the crystal structure of this alloy, being of ThMn_{12}-type, has never been questioned.
9
Content available remote

Influence of Carbon on Spin Reorientation Processes in Er_{2-x}R_xFe_{14}C (R~=~Gd, Pr) - Mössbauer and Magnetometric Studies

61%
Pędziwiatr A., Krawiec K., Bogacz B., Kapusta C., Przewoźnik J., Kaczorowski D., Talik E.
Acta Physica Polonica A
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2011
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vol. 119
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issue 1
48-51
EN
The Er_{2-x}R_{x}Fe_{14}C (R=Gd, Pr) polycrystalline compounds have been synthesized and investigated with ^{57}Fe Mössbauer spectroscopy and magnetic measurements. The spin reorientation phenomena were studied extensively by narrow step temperature scanning in the neighborhood of the spin reorientation temperature. Obtained Mössbauer spectra were analyzed using a procedure of simultaneous fitting and the transmission integral approach. Consistent description of Mössbauer spectra were obtained, temperature and composition dependencies of hyperfine interaction parameters and subspectra contributions were derived from fits and the transition temperatures were determined for all the compounds studied. Initial magnetization versus temperature measurements (in zero and non-zero external field) for Er_{2-x}Gd_{x}Fe_{14}C compounds allowed to establish the temperature regions of reorientation, change of magnetization value during the transition process. The results obtained with different methods were analyzed and the spin arrangement diagrams were constructed. Data obtained for Er_{2-x}Gd_{x}Fe_{14}C were compared with those for Er_{2-x}Gd_{x}Fe_{14}B series.
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