Vol. 43, Issue 1, pp. 117-122

  1. Archive
  2. Optica Applicata Vol. 43, Issue 1, pp. 117-122 (2013)
Vol. 43 Issue 1 pp. 117-122

Magnetic properties and surface domain structure of (Nd0.85Dy0.15)10Fe83Zr1B6 thin ribbons

Agnieszka Ceglarek, Danuta Plusa, Marcin Dospial, Marcin Nabialek, Pawel Wieczorek

Keywords

nanocomposite materials, melt-spinning method, Re–Fe–B alloys, hard magnetic magnets, surface domain structure

Abstract

In this paper, the nanocrystalline (Nd0.85Dy0.15)10Fe83Zr1B6 ribbons produced by melt-spinning have been investigated by the X-ray diffraction method (XRD), vibrating sample magnetometer (VSM) and magnetic force microscopy (MFM). The XRD studies showed that material investigated was mainly composed of Re2Fe14B and α-Fe phases with fine grain sizes of 25 and 9 nm, respectively. The magnetic parameters determined from the hysteresis loop measurements are as follows: μ0HC = 0.96 T, μ0MR = 0.76 T, μ0MS = 1.09 T, (BH)max = 88 kJ/m3. The large remanence ratio (μ0MR/μ0MS) of 0.7 results from the exchange coupling between the soft and hard magnetic grains. The large surface interaction domains revealed by MFM confirmed the existence of strong exchange coupling between nanosize grains.

Vol. 43
Issue 1
pp. 117-122

0.45 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology