Exchange Spring Evolution Throughout a Spin Reorientation Transition in Fe/NdCo5
We propose to investigate the evolution of the exchange spring in Fe/NdCo5 with temperature using polarized neutron reflectometry (PNR). The hard magnetic NdCo5 undergoes a spin reorientation transition (SRT) near room temperature, which manifests as a change of the in-plane magnetic easy axis from c-axis to a-axis. The structural and magnetic sensitivity of PNR will be used to obtain the in-plane magnetization vectors as a function of depth with an exchange spring nucleated in the soft magnetic Fe. By studying the temperature dependence of the exchange spring throughout the SRT, we aim to conclude on the exchange coupling strength across the interface and determine the mutual influence of Fe and NdCo5 on each other. Such interfacial exchange coupling phenomena are of fundamental interest in magnetic hybrid structures. The understanding how the SRT in NdCo5 transfers to Fe and how NdCo5 is in turn modified by Fe are prerequisites for advanced material design concepts with new functionalities. The additional degree of freedom provided by the possibility to switch the easy axis without changing external fields offers a range of applications in magnetic sensor and recording media.
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NEU Volker; HELLER Rene and SAERBECK Thomas. (2016). Exchange Spring Evolution Throughout a Spin Reorientation Transition in Fe/NdCo5. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-216
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