Heating influence on magnetic structure in Co and Fe rich amorphous microwires

• Different types of domain structures depending on the temperature are observed.
• Coexistence of domain walls with different value of mobility has been found.
• Sharp change of domain structure without movement of the domain walls takes place.

The influence of temperature on surface magnetic structure has been studied in Co- and Fe-rich magnetic glass covered microwires. The investigations have been performed using magneto-optical Kerr effect technique with a thermo-controlled system. It was found different types of domain structures depending on the temperature and the microwire composition. These types are characterised by the different domain period and the angle of the inclination of domain walls. It was established the direct correlation between surface domain structures and hysteresis loops. The coexistence of domain walls with different value of mobility has been found. It was observed original mechanism of the domain structure transformation: sharp change in the domain structure without movement of the domain walls.