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Giant magnetic viscosity in SmCo5−xCux alloys (1999)

Téllez-Blanco, J. C. ; Turtelli, R. Sato ; Grössinger, R.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 86 (1999), S. 5157-5163

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Hysteresis loops in SmCo5−xCux as-cast and annealed magnets (1〈x≤3) were measured at room temperature using a pulsed-field magnetometer and a static vibrating sample magnetometer. At field sweeps between 2 and 17 (GA/m)/s a giant—in this field range nearly constant—magnetic viscosity Sv was obtained. The viscosity is approximately proportional to the Cu concentration and to the coercive field. A heat treatment at 1273 K for three weeks changes the microstructure and enhances strongly the intensity and the time dependence of the coercivity. The decay of the inverse of the coercive field Hc with time follows a simple ln(t) relation between 10−5 and 10 s. Data analysis allows a density of stacking faults N to be extracted for each sample. Sv (and Hc) increases with N which increases with x. © 1999 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.371493

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