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Dynamic scaling of magnetic hysteresis in micron-sized Ni80Fe20 disks (1999)

Lee, W. Y. ; Choi, B.-Ch. ; Lee, J. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 74 (1999), S. 1609-1611

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The scaling of the magnetic hysteresis loop area of permalloy disks (20–400 μm diam) has been studied as a function of applied field amplitude H0 and frequency Ω using scanning Kerr microscopy. An increase in the dynamic coercivity with reduced size is observed for d〈100 μm in the frequency range studied (0.1–800 Hz). However, the loop area A follows the scaling relation A∝H0αΩβ, with α(approximate)0.14 and β(approximate)0.50 throughout the entire size range studied. Our results demonstrate that the dynamic scaling behavior is universal even though the lateral size influences the domain structure and magnetic reversal behavior. © 1999 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.123632

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