Genre: Information/Explanation

Recent theoretical studies have suggested that the observed suppression of superconductivity in superconductor / ferromagnet ( S / F ) heterostructures could be modulated by controlling the ferromagnetic exchange interaction in the superconductor . The exchange interaction in the superconductor is the sum of the exchange interaction from the ferromagnetic regions , which has a phase and magnitude that depends upon the direction that the ferromagnet is magnetised and the distance . As the exchange interaction has a phase it is possible that the contribution from two regions will cancel out . The exchange interaction , which can be viewed as an imbalance in the spin populations , suppresses superconductivity so any reduction in the exchange interaction will increase the superconducting transition temperature ( Tc ) of the heterostructure . Thus by changing the magnetisation of the ferromagnetic regions it is possible to control the exchange interaction in the superconductor and so the superconducting p. ..