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1

Magnetic Moments' Arrangement in Fe Layers Deposited from Acetone Based Electrolyte

100%

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.

2

Electrochemical Deposition of Nanowires in Porous Alumina

86%

Kalska-Szostko B., Brancewicz E., Mazalski P., Sveklo J., Olszewski W., Szymański K., Sidor A.

Acta Physica Polonica A

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2009

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vol. 115

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issue 2

542-544

EN

Electrochemical deposition is a very efficient method for producing many types of modern materials. The method is not expensive and does not have a limit for sample size. In our work the preparation of Ni, Co and Fe nanowires is presented. The obtained nanowires had different diameter and length which were tunable by template porous material and time of deposition, respectively. The quality of the prepared wires was dependent also on deposition mode. The smallest wires of the diameter around 40 nm were prepared in porous anodic alumina oxide obtained from oxalic acid. The largest ones, around 120 nm, were produced in phosphoric acid. The length could be as large as the thickness of the oxide and reached up to about 1 μm. The morphology of wires was studied by atomic force microscopy and scanning electron microscopy. The magnetic characterization was done with usage of magnetic force microscopy and the Mössbauer spectroscopy. The wires show magnetization along their growth direction.

3

Hyperfine Interactions of ^{57}Fe in Pt_3Fe - Ab Initio and Mössbauer Effect Studies

86%

Deniszczyk J., Satuła D., Waliszewski J., Rećko K., Olszewski W., Parzych G., Szymański K.

Acta Physica Polonica A

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2009

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vol. 115

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issue 1

197-199

EN

The Mössbauer effect and ab initio investigations of an electric field gradient at ^{57}Fe nuclei in Pt_3Fe compound are presented. It is shown that nonzero ^{57}Fe electric field gradient exists in the cubic Pt_3Fe. Ab initio study of Pt_3Fe in antiferromagnetic state confirms the presence of electric field gradient at ^{57}Fe nuclei. Lattice, local valence electron (3d, 4p) and weakly bound 3p core electron contributions to electric field gradient are separated out and discussed in the context of the electronic structure changes upon the antiferromagnetic phase transition.

4

Effect of Annealing in Multicomponent bcc Alloys

73%

Szymański K., Perzyńska K., Satuła D., Dobrzyński L., Zaleski P., Waliszewski J., Rećko K., Biernacka M., Olszewski W.

Acta Physica Polonica A

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2011

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vol. 119

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issue 1

62-64

EN

Multicomponent single phase alloys were synthesized according to the idea of iron-average atom system. X-ray diffraction shows formation of bcc phase and traces of unidentified phase. Mössbauer spectra indicate presence of two components with different hyperfine magnetic field distributions. The high field component corresponds to the majority ferromagnetic phase. Few per cent of iron builds low field component. The dominant effect of annealing consists in an increase of the low field component.

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4 Acta Physica Polonica A

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Magnetic Moments' Arrangement in Fe Layers Deposited from Acetone Based Electrolyte

Electrochemical Deposition of Nanowires in Porous Alumina

Hyperfine Interactions of ^{57}Fe in Pt_3Fe - Ab Initio and Mössbauer Effect Studies

Effect of Annealing in Multicomponent bcc Alloys