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| VOLUME 105 (2017) | ISSUE 1 | PAGE 32 |
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XMCD study of local magnetic and structural properties of microcrystalline NdFeB-based alloys1)
A. P. Menushenkov* 2), V. G. Ivanov*, I. V. Shchetinin+, D. G. Zhukov+, V. P. Menushenkov+, I. A. Rudnev*#, A. A. Ivanov*, F. Wilhelm×, A. Rogalev×, A. G. Savchenko+
*National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia +National University of Science and Technology MISIS, 119049 Moscow, Russia ×European Synchrotron Radiation Facility (ESRF), CS40220, F-38043 Grenoble Cedex 9, France #International Laboratory of High Magnetic Fields and Low Temperatures, 53-421 Wroclaw, Poland
Abstract
X-ray Magnetic Circular Dichroism (XMCD) technique was used to investigate local magnetic properties of microcrystalline Nd10.4Zr4.0Fe79.2B6.4 samples, oriented along either easy or hard magnetization direction. The Nd L2,3 and Fe K edge XMCD spectra were measured at room temperature under a magnetic field of  T. A very strong dependence of XMCD
spectra on the
sample orientation has been observed at the
L2,3 -edges of Nd, whereas
the Fe K-edge XMCD spectra are found to be practically isotropic. This
result indicates that magnetic anisotropy of NdFeB-based alloys
originates
from the Nd sublattice. In addition element selective magnetization
curves
have been recorded by measuring the intensity of XMCD signals as a
function
of an applied magnetic field up to  T.
To find a correlation between
local and macroscopic magnetic properties of studied samples we compared
these data with magnetization curves, measured by vibrating sample
magnetometer up to  T. Results are important for
understanding the origin of high-coercivity state in NdFeB-based
intermetallic compounds.
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