Volume 45, Number 4, February II 1999
|Page(s)||520 - 525|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Direct measurement of the splitting of crystal-field levels in the magnetically ordered state in by point-contact spectroscopy
Institute of Experimental Physics, Slovak Academy of
Sciences SK-04353 Košice, Slovakia
2 Faculty of Sciences, Šafarik University - Park Angelinum 9, SK-041 54 Košice, Slovakia
3 Laboratoire de Magnetisme Louis Néel, Centre National de la Recherche Scientifique B.P. 166, F-38042 Grenoble Cedex 9, France
Accepted: 4 December 1999
The measured point-contact spectra (directly proportional to the electron-quasi particle interaction function) of the heterocontact between oriented hexagonal single crystal of ferromagnetic NdNi5 and Cu in ballistic and thermal regime are presented above and below TC. At TC = 7 K maxima observed at characteristic energies around 1.5 and 4 meV are of crystal field (CEF) origin. Below TC the splitting of CEF levels by the exchange field is observed. This splitting is consistent with CEF and exchange parameters previously determined.
PACS: 73.40.Jn – Metal-to-metal contacts / 71.70.Ch – Crystal and ligand fields / 73.23.Ad – Ballistic transport
© EDP Sciences, 1999
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