Effect of the isoelectronic substitution of Sb for As on the magnetic and structural properties of LaFe(As1-xSbx)O
S.J.E. Carlsson, F. Levy-Bertrand, C. Marcenat, A. Sulpice, J. Marcus,, S. Pairis, T. Klein, M. N\'u\~nez-Regueiro, G. Garbarino, T. Hansen, V., Nassif, P. Toulemonde
TL;DR
This study investigates how substituting Sb for As in LaFe(As1-xSbx)O affects its magnetic and structural properties, revealing decreased transition temperatures and increased magnetic moments without inducing superconductivity.
Contribution
It provides new insights into the effects of isoelectronic Sb substitution on magnetic and structural transitions in LaFe(As1-xSbx)O, contrasting with phosphorus substitution effects.
Findings
Decreased structural and magnetic transition temperatures with Sb substitution.
No induction of superconductivity despite substitution.
Slight increase in Fe magnetic moment observed.
Abstract
The antiferromagnetic order and structural distortion in the LaFe(As1-xSbx)O system have been investigated by powder neutron diffraction and physical properties measurements. Polycrystalline samples of LaFe(As1-xSbx)O (x<0.5) were prepared using solid state synthesis at ambient and high pressure. We find that the isoelectronic substitution of Sb for As decreases the structural and magnetic transition temperatures but, contrary to the effects of phosphorus substitution, superconductivity is not induced. Instead a slight increase in the Fe magnetic moment is observed.
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