Abstract

Abstract Magnetic relaxation (magnetic viscosity) experiments were conducted in nanocrystalline single and two-phase NdFeB melt spun ribbons. On hysteresis loops, at applied demagnetizing fields at some degree lager than H c , an anomalous non-monotonic variation M ( t ) has been found for all investigated samples either with exchange coupled or decoupled grains. On recoil curves, the same non-monotonic variation of the magnetization has been found in the case of suppressed fields lower than H c .

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