Numerical study oft2gorbital system with ferromagnetic polarization

Numerical study of t2g orbital system with ferromagnetic polarization

Numerical Study of Competing Spin-Glass and Ferromagnetic Order

Two and three dimensional random Ising models with a Gaussian distribution of couplings with variance J and non-vanishing mean value J0 are studied using the zero-temperature domain-wall renormalization group (DWRG). The DWRG trajectories in the (J0, J) plane after rescaling can be collapsed on two curves: one for J0/J > rc and other for J0/J < rc. In the first case the DWRG flows are toward th...

Numerical Simulations of Ferromagnetic Materials

In this article, we give a glimpse on our last works in simulation of ferromagnetism phenomena. The main problems encountered in this type of computation are the demagnetization field and the microwave susceptibility computations. Difficulties for the demagnetization field come principally form the fact that the operator is nonlocal and the discretized operator gives a full matrix, we will focu...

Numerical study of a two-dimensional quantum antiferromagnet with random ferromagnetic bonds.

A Monte Carlo method for finite-temperature studies of the two-dimensional quantum Heisenberg antiferromagnet with random ferromagnetic bonds is presented. The scheme is based on an approximation which allows for an analytic summation over the realizations of the randomness, thereby significantly alleviating the “sign problem” for this frustrated spin system. The approximation is shown to be ve...

a study on construction of iranian life tables: the case study of modified brass logit system

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