| Автор | B N Cox |
| Дата выпуска | 1979-10-01 |
| dc.description | The effect of planar defects, particularly antiphase boundaries, upon the electronic structure and magnetic ordering of the ground states of certain binary and Heusler alloys is investigated theoretically. Because the magnetisation in question arises from bands of itinerant d electrons, the systems are taken to be described by a variant of Hubbard's Hamiltonian for a narrow s band. The planar defects are represented as a pair of adjacent planes between which anomalous values exist for the nearest-neighbour transfer matrix elements which constitute the kinetic part of the Hamiltonian. A tractable if crude model is generated by decoupling the equations of motion of the corresponding Green functions in the Hartree-Fock approximation, and self-consistent solutions are then obtained which manifest the site density of states and the distribution of magnetic moments in the vicinity of the defect. Comparison of the total energies of the pertinent ground states shows that, when the anomalous transfer matrix integrals are sufficiently larger than those characteristic of the bulk, the defect may support a narrow domain wall. Such a phenomenon has been observed to be associated with the periodically recurring stacking faults in Pd<sub>3</sub>Mn and the random antiphase boundaries found in the CuMnAl Heusler alloys and in MnAl. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Planar defects in itinerant ferromagnets |
| Тип | paper |
| DOI | 10.1088/0305-4608/9/10/016 |
| Print ISSN | 0305-4608 |
| Журнал | Journal of Physics F: Metal Physics |
| Том | 9 |
| Первая страница | 2067 |
| Последняя страница | 2079 |
| Аффилиация | B N Cox; Dept. of Theoretical Phys., Oxford Univ., Oxford, UK |
| Выпуск | 10 |
