Mictomagnetism is a spin system in which various exchange interactions are mixed. It is observed in several kinds of alloys, including Cu-Mn, Fe-Al and Ni-Mn alloys. Cooled in zero magnetic field, these materials have low remanence and coercivity. Cooled in a magnetic field, they have much larger remanence and the hysteresis loop is shifted in the direction opposite to the field (an effect similar to exchange bias).
Further reading 
- Beck, Paul A. (1972). "Comments on mictomagnetism". Journal of the Less Common Metals 28 (1): 193–199. doi:10.1016/0022-5088(72)90180-4.
- Shull, R.D.; Okamoto, H.; Beck, P.A. (1976). "Transition from ferromagnetism to mictomagnetism in Fe—Al alloys". Solid State Communications 20 (9): 863–868. doi:10.1016/0038-1098(76)91292-8.