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5 Acta Physica Polonica A

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Comparison of Properties of One-Dimensional ± J Ising Models on Square Lattices

100%

Błaszyk M.

Acta Physica Polonica A

2009

tom 115

nr 5

849-853

The energies and entropies of the one-dimensional ± J Ising models on square lattices have been compared. The method proposed in this paper explains the impossibility of getting exact results in nonzero temperatures and specifies the conditions of error minimisation.

One-Dimensional Spin Glass

63%

Błaszyk M. , Fechner B.

tom 110

nr 1

11-24

Thermodynamics of one-dimensional finite-ranged Ising model with quenched disorder introduced by random admixture of bonds with second neighbours by means of transfer-matrix method was determined. The influence of frustrations and competition on the internal energy, specific heat, correlations functions, and susceptibility was studied.

Influence of the Deposition Temperature οn Magnetotransport Properties οf Ni-Fe/Au/Co/Au Multilayers

51%

Błaszyk M. , Chomiuk P. , Buchta K. , Luciński T.

Acta Physica Polonica A

2009

tom 115

nr 1

363-365

A correlation between the growth process and electrical properties of [Ni_{80}Fe_{20}(2 nm)/Au(2 nm)/Co(0.8 nm)/Au(2 nm)]_{15} multilayers is presented. A set of multilayers of identical composition was deposited in different temperatures. The changes in giant magnetoresistance amplitude were correlated with the changes in Co layers growth process that occur in different temperatures. The in situ conductance measurement leads to the growth mechanism identification in high temperatures as formation of Co islands. Intensified islandisation of Co was eventually confirmed by the temperature changes in shape of the Hall voltage loops, and the evolution of Co layers contribution.

Interface Mixing in Fe/Si Multilayers Observed by the In Situ Conductance Measurements

51%

Chomiuk P. , Błaszyk M. , Szymański B. , Luciński T.

Acta Physica Polonica A

2009

tom 115

nr 1

355-356

In this contribution the in situ conductance vs. deposition time dependences of Fe/Si multilayers are analysed. The plot of resistance multiplied by the square of the thickness as a function of iron thickness shows that during the iron deposition initially amorphous-like Fe-Si mixture is formed, next the mixture crystallises, and finally bcc-Fe phase appears. The interface mixing is also manifested by the reduction of the total multilayer thickness measured by small angle X-ray diffraction.

Magnetic Tailoring of Domains in NiFe/Au/Co/Au Multilayers by He Ion Bombardment through Nanospheres

26%

Glapka W. , Kuświk P. , Sveklo I. , Urbaniak M. , Jóźwiak K. , Weis T. , Engel D. , Ehresmann A. , Błaszyk M. , Szymański B. , Maziewski A. , Stobiecki F.

Acta Physica Polonica A

2009

tom 115

nr 1

348-351

Sputter deposited (Ni_{80}Fe_{20}/Au/Co/Au)_{10} multilayers, characterized by alternating in-plane and perpendicular anisotropies of the NiFe and Co layers, respectively, and out-of-plane stripe (labyrinth) domain structure in the Co layers, were bombarded by He^+-ions (10 keV) through a mask consisting of polystyrene nanospheres with a diameter of 470 nm. The changes of multilayers magnetic properties after ion bombardment are correlated with the used mask structure.