Journal
PHYSICAL REVIEW B
Volume 104, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.054436
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Funding
- CNPq [422740/2018-7, 313624/2020-8]
- FAPERGS [PRONEX 16/0490-0]
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In this study, a peculiar magnetization reversal phenomenon, known as recoil-curve overshoot, was observed in magnetron-sputtered Co, Fe, and Ni films. The greatly enhanced recoil curve's remanence and coercivity led to a significant increase in loop's area. A model involving pairs of exchange-coupled grains with misaligned anisotropy axes successfully reproduced the key features of the recoil-curve overshoot and the kink in some major loops before saturation, providing further insights into the classical ferromagnetic hysteresis.
We report a peculiar magnetization reversal observed in magnetron-sputtered Co, Fe, and Ni films. We found that some recoil (minor) magnetization curves lie entirely and way outside the major loop, a phenomenon referred to here as a recoil-curve overshoot. The greatly enhanced recoil curve's remanence and coercivity result in an up to 2.5-fold increase of loop's area. The model of pairs of exchange-coupled grains with misaligned anisotropy axes reproduces, in a very good agreement with the experiment, all key features of the recoil-curve overshoot as well as the kink that some major loops present before saturation. The disclosed features of the ferromagnetic hysteresis provide further insights into this important classical phenomenon.
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