First-principles study is attempted to investigate L10-disorder phase equilibrium in Fe–Pt system. The present study consists of electronic structure total energy calculations by FLAPW for the ground state and statistical mechanics calculations by Cluster Variation Method for finite temperatures. It is revealed that the magnetism plays a crucial role in the phase stability. The spin polarized F...

Langmuir 2011, 27 (12), 7783−7787. DOI: 10.1021/la105051v ■ INTRODUCTION Recently, some of us reported on the production of magnetic noble metal nanoparticles. It was claimed, that when noble metal nanoparticles were synthesized in a sufficiently strong magnetic field, they would acquire (ferro)magnetism. The obtained magnetism was reported to be equivalent to that of iron if present at about 2...

We show that by displacing two optical lattices with respect to each other, we may produce interactions similar to the ones describing ferro-magnetism in condensed matter physics. We also show that particularly simple choices of the interaction lead to spin-squeezing, which may be used to improve the sensitivity of atomic clocks. Spin-squeezing is generated even with partially, and randomly, fi...

2014 The renormalization group techniques are applied, for the first time, to surface magnetism in bulk magnets, for all signs of surface and bulk coupling constants. The q-state Potts model is specifically focused upon, and an interesting q-evolution of the phase diagram is exhibited. In particular the Ising model (q = 2) presents a remarkable feature in the case of competing bulk-and surface ...

The science of physics is built on theories and models as well as on experiments: the former structure relations and simplify reality to a degree such that predictions on physical phenomena can be derived by means of mathematics. The latter allow to verify — or falsify — these predictions. Computer sciences allow a new access to this relationship, especially well-suited for education: New Media...

In one dimension, the study of magnetism dates back to the dawn of quantum mechanics when Bethe solved the famous Heisenberg model that describes quantum behaviour in magnetic systems. In the last decade, one-dimensional (1D) systems have become a forefront area of research driven by the realization of the Tonks-Girardeau gas using cold atomic gases. Here we prove that 1D fermionic and bosonic ...

Two-dimensional (2D) transition metal dichalcogenides (TMDs) have been widely used from nanodevices to energy harvesting/storage because of their tunable physical and chemical properties. In this work, we systematically investigate the effects of hydrogenation on the structural, electronic, magnetic, and catalytic properties of 33 TMDs based on first-principles calculations. We find that the st...

Strongly correlated systems with the interplay of electronic, charge, spin, and orbital degrees freedom have, in recent times, received a surge interest because their rich physics, novel physical properties, potential applications. In present work, we study structural, magnetic, electronic properties ordering layered perovskite-type $A\mathrm{Mn}{\mathrm{F}}_{4} (A=\mathrm{K},\mathrm{Rb})$ from...