Abnormal coercivity behavior and magnetostatic coupling in SmCoCuFeZr magnets
Source abstract
Abstract
Abstract It is investigated the behavior of the coercivity as function of the temperature in SmCo 2:17 type magnets. These magnets are a 5 element alloy with Sm, Co, Fe, Cu and Zr. The magnets have a peculiar nanostructure, where the nanocrystalline grains of the main ferromagnetic phase - rhomobohedral Sm2(CoFe)17 - are enveloped by a cell boundary Sm(CoCu)5 phase. The samples present different behavior as function of temperature, which is attributed to different copper content inside the Sm(Co,Cu)5 cell boundary phase. It is found that the experimental hysteresis curves of high coercivity magnets can be theoretically described by a mean field Stoner-Wohlfarth model. It is observed a spring effect: When a magnetized sample is exposed to reversal field of the order of −1.5 Tesla, the magnetization returns to near the remanence value. The microstructure that results in high coercivity SmCo 2:17 type magnets is discussed in detail.
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Research context
OpenAlex topics: Magnetic Properties of Alloys · Magnetic Properties and Applications · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (69)
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