Grzegorz Wiatrowski

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We present the application of computer algebra systems (CAS) to symbolic construction of algebraic equations describing different ordered as well as stochastic magnetic structures. We start with formal and exact, however non-tractable from the numerical point of view, Callen equations. Then, we apply the integral operator method (based on the integral(More)
We present a new method of calculation of partition function for the layered systems with the arbitrary spin-modulated structure in the linear cluster approximation. The thermodynamic description of the system in question is based on the Bogolyubov variational principle (inequality). The transfer matrix technique is used to determine the partition function,(More)
We present the application of computer algebra systems to symbolic construction of two coupled systems of equations obtained from the exact Callen equation for a set of magnetizations and relevant magnetic susceptibilities in the case of complex amorphous ternary and binary diluted alloys like (A p B 1-p) x C 1-x with concentrations p and x, and different(More)
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