Abstract
A simple method for characterizing spring-type magnets is proposed by using a standard magneto-optical Kerr effect (MOKE) rig. As we previously reported, a spiral structure with parallel field (longitudinal) and normal field (transverse) components can easily develop in Laves-phase spring-type superlattice magnets once an external field is applied. Based on a phenomenological formula both longitudinal and transverse components in the exchange-springs can be probed simultaneously by MOKE. Out finding shows that not only the Kerr angle but the reflectivity change induced from transverse components can be used as good indicators for the formation of spiral structure in the spring-magnet.
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