Chesterfield have signed Birmingham City midfielder Mark Duffy, Sheffield Wednesday forward Caolan Lavery and Wolves defender Ashley Carter on loan.
Duffy, 29, has played seven times for Blues since joining in June and will stay with the Spireites for one month.
Lavery, 22, has scored four goals for the Owls and will stay at the Proact Stadium until 7 March while Carter, 19, has signed a youth loan.
Meanwhile, Wednesday forward Mani Dieseruvwe has signed a permanent deal.
The 19-year-old featured once after joining on loan last month and has signed an 18-month deal.