K. Pawlik

P. Pawlik; K. Pawlik; H.A. Davies; J.J. Wysłocki; W. Kaszuwara

Hard magnetic thick ribbon samples of a series of Pr9-xDyxFe60Co13Zr1+yTi3-yB14 alloys (where x=0;1 and y=0;1) (having average thicknesses tr of~ 140 µm) were produced directly by the melt-spinning technique under an Ar atmosphere. The phase constitution of the samples in the as-cast state was determined by X-ray diffractomety and Mossbauer spectroscopy. Hysteresis loops measurements at room temperature indicated very good hard magnetic properties for the alloys, which the coercivity attaining a maximum values of 1.58 MA/m. This is comparable with the coercivities of commercial NdFeB magnets based on melt spun ribbon and with those for nanocrystalline Nd-Fe-B magnets produces by other processes such as mechanical alloying or HDDR.

J.J. Wysłocki; P. Pawlik; K. Pawlik

Abstract The mechanism of magnetization reversal processes in Sm–Fe–N permanent magnets has been investigated on the basis of the analysis of the rotational hysteresis energy, W r , calculated from the magnetic torque curves. Moreover, the anisotropy constants K 1 and K 2 have been determined from the Fourier analysis of the torque curves. The results are compared with the theoretical predictions.

K. Pawlik; I. Škorvánek; J. Kováč; P. Pawlik; J.J. Wysłocki; O. Bodak

P. Pawlik; K. Pawlik; H.A. Davies; W. Kaszuwara; J.J. Wysłocki; Neil J. Harrison; I. Todd

P. Pawlik; K. Pawlik; H.A. Davies; W. Kaszuwara; J.J. Wysłocki

Piotr Pawlik; K. Pawlik; Hywel A. Davies; J.J. Wysłocki; W. Kaszuwara; Marcin Leonowicz

A. Przybył; K. Pawlik; P. Pawlik; P. Gębara; J.J. Wysłocki

K. Pawlik; P. Pawlik; J.J. Wysłocki; W. Kaszuwara

P. Gębara; P. Pawlik; I. Škorvánek; J. Marcin; J.J. Wysłocki; M. Szwaja; K. Pawlik

Małgorzata Szwaja; P. Gębara; Jacek Filipecki; K. Pawlik; Anna Przybył; P. Pawlik; J.J. Wysłocki; Katarzyna Filipecka