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The effect of Zr content on exchange coupling and magnetization reversal of the Nd12.3Fe81.7-xZrxB6(x=0-3.0) ribbons was systematically investigated.Interaction domains were imaged by magnetic force microscopy(MFM).The strength of interactions determined byWohlfarth’s analysis increased first with Zr content x increasing,reached the maximum value at x=1.5,and then decreased with x further increasing.Initial magnetization curves and dependence of coercivity and remanence on applied magnetic field showed that the mechanism ofcoercivity in all samples was mainly of exchange coupling pinning type,which was enhanced with x increasing.It was found bythree-dimensional atom probe(3DAP) that Zr atoms did not partition into the Nd2Fe14B hard magnetic phase,but significantly enriched at theinterfacial region.
The effect of Zr content on exchange coupling and magnetization reversal of the Nd12.3Fe81.7-xZrxB6 (x = 0-3.0) ribbons was systematically investigated. Interaction domains were imaged by magnetic force microscopy (MFM). The strength of the interaction determined by Wohlfarth’s analyzed increased first with Zr content x increasing, reached the maximum value at x = 1.5, and then decreased with x further increasing. Initial magnetization curves and dependence of coercivity and remanence on applied magnetic field curve that the mechanism of coercivity in all samples was mainly of exchange coupling pinning type, which was enhanced with x increasing. It was found by three-dimensional atom probe (3DAP) that Zr atoms did not partition into the Nd2Fe14B hard magnetic phase, but significantly enriched at the interfacial region.