Fluxmetric and magnetometric demagnetizing factors for cylinders

Chen, D.-X.; Pardo, Enric; Sanchez, Alvaro

doi:10.1016/j.jmmm.2006.02.235

Cited by 118 publications

(81 citation statements)

References 23 publications

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“…As a summary, such calculations with accuracy about 0.1% have been carried out for the magnetometric demagnetizing factor of cylinders, square bars, and rectangular prisms, 16,17,22,46,47 for the ac susceptibility of conducting cylinders and magnetic conducting spheres, 14,18 and for the perpendicular susceptibility of completely shielded rectangular films. 20,21 Using well calibrated ac susceptometers to study superconducting materials, model calculations ͑with lower accuracy͒ for the properties of the samples are important.…”

Section: F Model Calculationsmentioning

confidence: 99%

Calibration of low-temperature ac susceptometers with a copper cylinder standard

Chen

Skumryev

2010

Review of Scientific Instruments

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A high-quality low-temperature ac susceptometer is calibrated by comparing the measured ac susceptibility of a copper cylinder with its eddy-current ac susceptibility accurately calculated. Different from conventional calibration techniques that compare the measured results with the known property of a standard sample at certain fixed temperature T, field amplitude H m , and frequency f, to get a magnitude correction factor, here, the electromagnetic properties of the copper cylinder are unknown and are determined during the calibration of the ac susceptometer in the entire T, H m , and f range. It is shown that the maximum magnitude error and the maximum phase error of the susceptometer are less than 0.7% and 0.3°, respectively, in the region T = 5 -300 K and f = 111-1111 Hz at H m = 800 A / m, after a magnitude correction by a constant factor as done in a conventional calibration. However, the magnitude and phase errors can reach 2% and 4.3°at 10 000 and 11 Hz, respectively. Since the errors are reproducible, a large portion of them may be further corrected after a calibration, the procedure for which is given. Conceptual discussions concerning the error sources, comparison with other calibration methods, and applications of ac susceptibility techniques are presented.

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Section: F Model Calculationsmentioning

confidence: 99%

Calibration of low-temperature ac susceptometers with a copper cylinder standard

Chen

Skumryev

2010

Review of Scientific Instruments

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“…The value of N can be roughly estimated by using the demagnetizing factor of the ellipsoidal bodies [8] as From (2), it is easy to understand that the value of µeff strongly depends on the value of N. In other words, the value of µeff is defined by the inverse value of N when the value of µr for the core is relatively large:…”

Section: A Conventionalmentioning

confidence: 99%

Estimation of Effective Permeability for Dumbbell-Shaped Magnetic Cores

2015

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“…Our description will rely on a simplified modelling of demagnetizing field (Chen et al (2006);Osborn (1945)). Demagnetizing field energy modelling is still of great importance for micromagnetism studies of magnetic sensors.…”

Section: Ferromagnetic Corementioning

confidence: 99%

“…However in common shapes of ferromagnetic cores demagnetizing coefficients are inhomogenenous and numerical simulation could be helpfull to guide the design. As explained in Chen et al (2006) one should distinguish between fluxmetric and magnetometric demagnetizing coefficient. The apparent permeability of concerns should be the one along the coil.…”

Section: Ferromagnetic Corementioning

confidence: 99%

Induction Magnetometers Principle, Modeling and Ways of Improvement

Coillot¹,

Leroy²

2012

Magnetic Sensors - Principles and Applications

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International audienceThis book provides an introductory overview of the research done in recent years in the area of magnetic sensors. The topics presented in this book range from fundamental theories and properties of magnets and their sensing applications in areas such as biomedicine, microelectromechanical systems, nano-satellites and pedestrian tracking. Written for the readers who wished to obtain a basic understanding of the research area as well as to explore other potential areas of applications for magnetic sensors, this book presents exciting developments in the field in a highly readable manner

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Fluxmetric and magnetometric demagnetizing factors for cylinders

Cited by 118 publications

References 23 publications

Calibration of low-temperature ac susceptometers with a copper cylinder standard

Calibration of low-temperature ac susceptometers with a copper cylinder standard

Estimation of Effective Permeability for Dumbbell-Shaped Magnetic Cores

Induction Magnetometers Principle, Modeling and Ways of Improvement

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