Zobrazeno 1 - 10
of 165
pro vyhledávání: '"Du-Xing Chen"'
Publikováno v:
IEEE Magnetics Letters. 12:1-5
We measured saturated hysteresis loops of a MuMETAL ring using a computerized, high-resolution apparatus by both extrapolated continuous recording and automatic ballistic methods. The recording time per loop varied from 17.7 to 141.6 s. The loops obt
Autor:
Du-Xing Chen
Publikováno v:
IEEE Transactions on Magnetics. 55:1-10
The demagnetizing field $H_{d}$ produced by local magnetic poles around the ends of soft magnetic cylinders magnetized in International Electrotechnical Commission type-B permeameter is studied experimentally along the major hysteresis loop $M(H)$ .
Publikováno v:
IEEE Transactions on Applied Superconductivity. 29:1-4
An experimental investigation on ac susceptibility χ = χ′ − j χ′′ of Bi-2223/Ag superconducting tapes with different lengths L is carried out under a perpendicular ac magnetic field. A series of n -value is deduced from the ac susceptibili
Autor:
Du-Xing Chen
Publikováno v:
IEEE Magnetics Letters. 10:1-4
The midplane and volume-averaged demagnetizing factors, N mid and Nvol, for a uniformly magnetized cylinder of length l s and radius r s clamped in the pole gap of an electromagnet with end gaps of total length d s are calculated as functions of d s
Autor:
Du-Xing Chen, Yong-Hong Zhu
Publikováno v:
Review of Scientific Instruments. 93:055105
The effective magnetic path length l m for a 25 cm Epstein frame test is studied on the basis of a relevant demagnetizing model and determined by a comparative measurement of dc and ac hysteresis loops at each value of peak flux density B p, with the
Publikováno v:
Physica C: Superconductivity and its Applications. 553:21-25
The voltage-current V(I) curve of high-temperature superconductor tapes as a function of current ramp rate R modelled by the collective flux creep model, with a power-law dependence of local electric field on current density, shows an approximate low
Publikováno v:
Journal of Magnetism and Magnetic Materials. 458:137-146
A technique is developed to calibrate the performance of a permeameter for measuring soft magnetic materials, having a C-shaped magnetic potential H-coil near the sample surface and a B-coil surrounding the sample, by using cylindrical standard sampl
Publikováno v:
Journal of Magnetism and Magnetic Materials. 449:447-454
A technique is proposed for demagnetizing correction of the measured magnetization curve and hysteresis loop, i.e., the M ∗ ( H a ) curve, of a ferromagnetic cylinder into the true M ( H ) curve of the material, where H a is the uniform applied fie
Autor:
Du-Xing Chen
Publikováno v:
IEEE Magnetics Letters. 9:1-4
A differential paramagnetic approach is used for the demagnetizing correction of solenoid measurements of soft magnetic cylinders. In this approach, an accurately calculated fluxmetric demagnetizing factor for a paramagnetic cylinder of length-to-dia
Autor:
Shuo Li, Du-Xing Chen
Publikováno v:
IEEE Magnetics Letters. 9:1-5
The field-amplitude-dependent ac susceptibility $\chi (H_m)$ and the voltage-current curve $V(I)$ of rectangular samples cut from the same high-temperature superconductor strip are measured at 77 K. The high- $H_m$ part of $\chi (H_m)$ and the high-