Abstract
The effect of Cu doping on the spin entropy of Ca3Co4O9+δ system has been investigated through the measurements of magnetothermopower and magnetic properties. It is found that the thermopower decreases with increasing Cu doping. Magnetothermopower results reveal that Cu doping suppresses the spin entropy of Ca3Co4O9+δ system. The magnetic results demonstrate that the Co4+ concentration increases with increasing Cu doping level. This investigation suggests that the decrease in thermopower is attributed to the spin entropy suppression, which originates from the increase of the Co4+ concentration induced by Cu doping.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
