Decagonal quasiferromagnetic microstructure on the penrose tiling |
| |
Authors: | Vedmedenko E Y Oepen H P Kirschner J |
| |
Affiliation: | Institut für Angewandte Physik, Jungiusstrasse 11, 20355 Hamburg, Germany. |
| |
Abstract: | The stable magnetization configurations of a ferromagnet on a quasiperiodic tiling have been derived theoretically. The magnetization configuration is investigated as a function of the ratio of the exchange to the dipolar energy. The exchange coupling is assumed to decrease exponentially with the distance between magnetic moments. It is demonstrated that for a weak exchange interaction the new structure, the quasiferromagnetic decagonal configuration, corresponds to the minimum of the free energy. The decagonal state represents a new class of frustrated systems where the degenerated ground state is aperiodic and consists of two parts: ordered decagon rings and disordered spin-glass-like phase inside the decagons. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|