Inter - Grain Exchange Interaction and Hysteresis Loops of Melt - Spun Nd₁₃Fe77B10 = Inter - Grain Exchange Interaction and Hysteresis Loops of Melt - Spun Nd₁₃Fe77B10

다국어 초록 (Multilingual Abstract)

Hysteresis loops of melt-spun Nd₁₃Fe_(77) B_(10) cooled down at remanent state were measured at 4.2 K and 250 K. The hysteresis loops were analysed on the basis of the Stoner-Wohlfarth (S-W) model, the inter-grain exchange coupled single domain (SD) model and micromagnetism. The coercivity higher than that predicted from the S-W model and the striking shift of the thin minor loop along the H-axis observed at the fields of Hmax = 4 MA/m at 4.2 K indicated new evidences for the inter-grain exchange interaction. The S-W model failed in explaining the high_i Hc and the shift of the thin minor loop. The exchange coupled SD model was found to explain the experimental results qualitatively without difficulties associated with the S-W model. The micromagnetic calculations using a finite element technique simulated the experimental results fairly well quntitatively.

목차 (Table of Contents)

• Abstract
  
• 1. Introduction
  
• 2. Experiments
  
• 3. Model and Calculations
  
• 4. Results and Discussion
  
• Acknowledgement
  
• References