## References

SHOWING 1-10 OF 149 REFERENCES

### Contribution to the Spin-Wave Theory of a Dilute Heisenberg Ferromagnet

- Physics
- 1969

A spin-wave theory of a dilute Heisenberg ferromagnet is studied using Green's function techniques. The Green's function for one-magnon excitations is calculated in two ways, a decoupling method and…

### Excitations in impure magnetic crystals

- Physics
- 1972

In this thesis we consider two types of magnetic system, the ferromagnet and the antiferromagnet, containing substitutional impurities. The Heisenberg Hamiltonian is used and the spin-waves are…

### Excitations in the dilute Heisenberg ferromagnet using the coherent potential approximation

- Physics
- 1974

The coherent potential approximation (CPA) has been generalized to describe spin waves in a dilute Heisenberg ferromagnet at T=0. The full T matrix of an isolated vacancy in an effective medium is…

### A Green function theory of spin waves in randomly disordered magnetic systems. I. The ferromagnet

- Physics
- 1971

The authors present a new technique for discussing the behaviour of spin waves in a ferromagnetically ordered system where the spins occupy random positions on a lattice. It is shown how a…

### Spin-wave theory of ferromagnetic crystals containing impurities

- Physics
- 1966

A spin-wave theory of ferromagnetic crystals containing a low concentration of impurity atoms with different spin and exchange integrals is developed by a Green function method. The Green function of…

### Contribution to the theory of a dilute Heisenberg ferromagnet

- Physics
- 1970

A theory of a dilute Heisenberg ferromagnet is studied in two ways; the molecular field approximation and the Tyablikov approximation. By considering the Heisenberg model in the molecular field…

### Spin waves and long-range order in the diluted heisenberg ferromagnet at zero temperature

- Physics
- 1973

The variational treatment of spin waves in the randomly diluted Heisenberg ferromagnet at zero temperature is studied. It is argued that a convenient variational principle for the excitation spectrum…

### Excitations in randomly diluted ferromagnets

- Physics
- 1975

The dynamics of a randomly diluted quenched Heisenberg ferromagnet have recently been analyzed by several authors. Within an effective medium type of approach, the correct site aspect of this problem…

### Spin-Wave Impurity Levels in a Heisenberg Ferromagnet

- Physics
- 1963

As an application of the results obtained in a preceding paper, spin-wave impurity levels in a Heisenberg ferromagnet due to a magnetic or a nonmagnetic impurity are studied, which are discrete and…

### Spin waves in disordered materials

- PhysicsJournal of physics. Condensed matter : an Institute of Physics journal
- 2018

An efficient methodology to study spin waves in disordered materials based on a Heisenberg model and enables calculations of magnon properties in spin systems with disorder of an arbitrary kind and concentration of impurities is presented.