Memory and superposition in a spin glass
Abstract
Nonequilibrium dynamics in a Ag(Mn) spin glass are investigated by measurements of the temperature dependence of the remanent magnetization. Using specific cooling protocols before recording the thermo- or isothermal remanent magnetizations on reheating, it is found that the measured curves effectively disclose nonequilibrium spin glass characteristics such as aging and memory phenomena as well as an extended validity of the superposition principle for the relaxation. The usefulness of this ``simple'' dc method is discussed, as well as its applicability to other disordered magnetic systems.
- Publication:
-
Physical Review B
- Pub Date:
- March 2001
- DOI:
- 10.1103/PhysRevB.63.092401
- arXiv:
- arXiv:cond-mat/0007070
- Bibcode:
- 2001PhRvB..63i2401M
- Keywords:
-
- 75.50.Lk;
- 75.40.Gb;
- Spin glasses and other random magnets;
- Dynamic properties;
- Condensed Matter - Materials Science
- E-Print:
- REVTeX style