Premium
Electrical Resistivity and Magnetic Susceptibility Measurements on Copper Arsenides
Author(s) -
Pauwels L. J.,
Maervoet G.,
Vervaeke R.
Publication year - 1973
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19733970310
Subject(s) - diamagnetism , electrical resistivity and conductivity , paramagnetism , magnetic susceptibility , copper , condensed matter physics , tetragonal crystal system , residual resistivity , stoichiometry , pauli exclusion principle , materials science , curie–weiss law , curie temperature , chemistry , analytical chemistry (journal) , nuclear magnetic resonance , ferromagnetism , superconductivity , crystallography , magnetic field , metallurgy , physics , crystal structure , quantum mechanics , chromatography
Electrical resistivity (4.2–800°K) and magnetic susceptibility (4.2–500°K) measurements are carried out on Cu 3–x As, Cu 5–x As 2 and the recently obtained, tetragonal Cu 2 As. All three compounds appear to be metallic conductors, but have high residual resistances because of the large defect concentrations (resulting from non‐stoichiometry and preparation method). Cu 3–x As is diamagnetic; Cu 5–x As 2 is Pauli‐paramagnetic; Cu 2 As has a very small, constant, positive susceptibility above room temperature and a more pronounced Curie‐Weiss behaviour at lower temperatures. The Pauli‐paramagnetic contributions have been estimated. A slight anomaly in the electric and magnetic behaviour of Cu 3–x As is observed at 220°K. To clarify the high‐temperature phenomena, a series of D.T.A. and X‐ray experiments has also been carried out.