Ferromagnetism of SmCd

A Theory of Ferromagnetism.

Room-temperature ferromagnetism of graphene.

Aiming at molecular-based magnets, ferromagnetism of pure carbon-based materials is fundamentally and technologically extremely important for many applications. While it is still not fully understood, many recent theoretical works have suggested that one-atom-thick two-dimensional graphene materials may show ferromagnetism due to the existence of various defects or topological structures as the...

Reproduction and ferromagnetism

I present a stochastic population model that combines cooperative interactions of the type often used in physics with the process of reproduction and death familiar to biology, and I refer to reasons why such interlocking may be of interest to both fields. Physics and biology have developed good frameworks to model the process of stochastic change in systems which experience the action of coope...

Ferromagnetism of Fe3Sn and Alloys

Hexagonal Fe(3)Sn has many of the desirable properties for a new permanent magnet phase with a Curie temperature of 725 K, a saturation moment of 1.18 MA/m. and anisotropy energy, K1 of 1.8 MJ/m(3). However, contrary to earlier experimental reports, we found both experimentally and theoretically that the easy magnetic axis lies in the hexagonal plane, which is undesirable for a permanent magnet...

Ferromagnetism in Hubbard models.

We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U . The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism ...