Reversible Magnetization Processes Evaluation Using High-Order Magnetization Curves

A method for the estimation of reversible and irreversible susceptibilities of initial magnetization curves has been developed. It deals with the energy necessary for magnetizing and demagnetizing the sample, but neither with the nature of the magnetization processes nor with a specific type of anisotropy, so it could be applied for a wide variety of real materials. A set of minor hysteresis loops of an initially demagnetized sample, plotted with progressively increasing maximum magnetic field, has been used. The obtained results showed excellent agreement with those calculated by the remanence curve method for a Stoner–Wohlfarth model system.

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Reversible magnetization processes and energy density product in Sm–CoFe and Sm–Co/Co bilayers

Journal of Applied Physics ◽

10.1063/1.1558245 ◽

2003 ◽

Vol 93 (10) ◽

pp. 6489-6491 ◽

Cited By ~ 20

Author(s):

T. Schrefl ◽

H. Forster ◽

R. Dittrich ◽

D. Suess ◽

W. Scholz ◽

...

Keyword(s):

Energy Density ◽

Reversible Magnetization ◽

Magnetization Processes

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Circular Magnetization Processes in CoFeNi Electroplated Wires

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.341 ◽

2009 ◽

Vol 152-153 ◽

pp. 341-344 ◽

Cited By ~ 2

Author(s):

H. García-Miquel ◽

V.M. García-Chocano ◽

G.V. Kurlyandskaya

Keyword(s):

External Field ◽

Magnetic Materials ◽

Hysteresis Loops ◽

Soft Magnetic Materials ◽

Magnetization Curves ◽

Frequency Range ◽

Soft Magnetic ◽

Sensor Applications ◽

Magnetization Processes

Circular magnetization processes in electroplated wires is an important topic having straight connection with sensor applications of these soft magnetic materials. In present work the longitudinal and circular hysteresis loops were measured and corresponding magnetization processes were studied in Cu98Be2/Co16Fe20Ni64 wires. The longitudinal hysteresis loops, Mz-Hz, were measured by inductive technique in a frequency range of 10 to 70 Hz. The circular magnetization curves (Mφ- Hφ) were measured for frequencies of 50 and 100 kHz in the Hφ field up to 1500A/m for different values of the axial external field of 0 to 500 A/m. The longitudinal and circular magnetization curves are comparatively analyzed.

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Circumferential permeability in nonmagnetostrictive amorphous wires

Journal of Materials Research ◽

10.1557/jmr.1996.0313 ◽

1996 ◽

Vol 11 (10) ◽

pp. 2486-2489 ◽

Cited By ~ 25

Author(s):

M. L. Sanchez ◽

R. Valenzuela ◽

M. Vazquez ◽

A. Hernando

Keyword(s):

Domain Wall ◽

Current Amplitude ◽

Complex Permeability ◽

Equivalent Circuits ◽

Magnetization Curves ◽

Frequency Range ◽

Impedance Response ◽

Amorphous Wires ◽

Circular Field ◽

Magnetization Processes

Real and imaginary components of the impedance response on Co68.1Fe4.4B15Si12.5 amorphous as-cast wires were measured in the 100 Hz-100 kHz frequency range and 0.05–30 mA (RMS) current amplitude, at axial dc fields of 0 and 4800 A/m. From these data, plots of circumferential complex permeability as a function of circular field, as well as magnetization curves, were derived. Results are analyzed in terms equivalent circuits, which allows a resolution of domain wall and rotational contributions to the circumferential magnetization processes.

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Reversible magnetization processes in amorphous alloys

Journal of Magnetism and Magnetic Materials ◽

10.1016/0304-8853(94)90502-9 ◽

1994 ◽

Vol 133 (1-3) ◽

pp. 107-110 ◽

Cited By ~ 6

Author(s):

C. Appino ◽

F. Fiorillo

Keyword(s):

Amorphous Alloys ◽

Reversible Magnetization ◽

Magnetization Processes

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Investigation of Magnetic Behavior of SmCo5/SmCo2 Nanocrystalline Magnets

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.303-306.2644 ◽

2013 ◽

Vol 303-306 ◽

pp. 2644-2647

Author(s):

Li Ya Li ◽

Jian Hong Yi ◽

Ai Kun Li ◽

Yuan Dong Peng

Keyword(s):

Exchange Coupling ◽

Melt Spinning ◽

Domain Walls ◽

Coupling Effect ◽

Magnetic Behavior ◽

Secondary Phase ◽

Wheel Speed ◽

Magnetization Curves ◽

Pinning Of Domain Walls ◽

Magnetization Processes

Nanocrystalline magnets (SmCo5)94(Cr3C2)6 were prepared using melt-spinning and their magnetic behaviors were investigated by studying their structures and magnetic properties. The alloys prepared using rapid solidification consisted of SmCo5 matrix phase, MgCu2-type SmCo2 secondary phase, and small traces of Sm2Co7 phase. The solidification with higher wheel speed were found to be preferable for the formation of single SmCo2 secondary phase. Relatively high coercive values of 28–36 kOe and high reduced remanence of 0.78–0.79 were observed for the SmCo5/SmCo2 nanocrystalline magnets. The shape of the corresponding magnetization curves revealed that two magnetization processes, nucleation and pinning of domain walls, took place in these magnets. The Henkel plots indicated strong inter-grain exchange coupling effect in these ribbons, consequently resulted in the phenomena of domains interacting with each other and enhancement of the remanence in the ribbons.

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