Sb-5p-mediated antiparallel Nd-Fe coupling in Nd3Fe3Sb7
Abstract
We uncover the microscopic mechanism underlying the antiparallel Nd-Fe coupling in the intermetallic 4f-3d-5p compound Nd3Fe3Sb7 by means of high-field x-ray magnetic circular dichroism (XMCD) spectroscopy, complemented by magnetization measurements and density-functional-theory (DFT) calculations. This coupling is unexpected for intermetallics composed of light rare-earth and transition-metal elements. Sb M4,5-edge XMCD measurements indicate a clear spin polarization of Sb 5p states antiparallel to the Fe 3d moments. DFT calculations reveal the site-dependent character of the Sb moments and, together with the Fe-Sb antiparallel alignment seen by XMCD, identify a Fe 3d-Sb 5p-Nd 5d hybridization pathway for the antiparallel Nd-Fe coupling. Pulsed-field XMCD reveals a field-induced spin reorientation through the evolution of the c-axis projections of the Nd and Fe moments. Nd3Fe3Sb7, thus, provides a platform for exploring antiparallel rare-earth-transition-metal (R-T) coupling mediated by transition-metal 3d-ligand p-rare-earth 5d hybridization in light-R-T intermetallics with p-elements.
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BibTeX
@misc{palazzese2026sb5pmediated,
title = {{Sb-5$p$-mediated antiparallel Nd-Fe coupling in Nd$_3$Fe$_3$Sb$_7$}},
author = {S. Palazzese and Sh. Yamamoto and T. Kotte and R. Ray and F. Pabst and S. Chattopadhyay and D. I. Gorbunov and T. Herrmannsdörfer and K. Kummer and A. Kurtanidze and E. Weschke and O. Prokhnenko and K. Yamamoto and Y. Kotani and H. Nojiri and M. Ruck and Manuel Richter and J. Wosnitza},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.20883},
eprint = {2610.20883},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.20883},
}
RIS
TY - UNPB
TI - Sb-5p-mediated antiparallel Nd-Fe coupling in Nd_3Fe_3Sb_7
AU - S. Palazzese
AU - Sh. Yamamoto
AU - T. Kotte
AU - R. Ray
AU - F. Pabst
AU - S. Chattopadhyay
AU - D. I. Gorbunov
AU - T. Herrmannsdörfer
AU - K. Kummer
AU - A. Kurtanidze
AU - E. Weschke
AU - O. Prokhnenko
AU - K. Yamamoto
AU - Y. Kotani
AU - H. Nojiri
AU - M. Ruck
AU - Manuel Richter
AU - J. Wosnitza
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2610.20883
UR - https://arxiv.org/abs/2610.20883
AB - We uncover the microscopic mechanism underlying the antiparallel Nd-Fe coupling in the intermetallic 4f-3d-5p compound Nd_3Fe_3Sb_7 by means of high-field x-ray magnetic circular dichroism (XMCD) spectroscopy, complemented by magnetization measurements and density-functional-theory (DFT) calculations. This coupling is unexpected for intermetallics composed of light rare-earth and transition-metal elements. Sb M_4,5-edge XMCD measurements indicate a clear spin polarization of Sb 5p states antiparallel to the Fe 3d moments. DFT calculations reveal the site-dependent character of the Sb moments and, together with the Fe-Sb antiparallel alignment seen by XMCD, identify a Fe 3d-Sb 5p-Nd 5d hybridization pathway for the antiparallel Nd-Fe coupling. Pulsed-field XMCD reveals a field-induced spin reorientation through the evolution of the c-axis projections of the Nd and Fe moments. Nd_3Fe_3Sb_7, thus, provides a platform for exploring antiparallel rare-earth-transition-metal (R-T) coupling mediated by transition-metal 3d-ligand p-rare-earth 5d hybridization in light-R-T intermetallics with p-elements.
ER -