title: Diffusion mechanism of exchange bias formation in permalloy-manganese nanostructures at thermo-magnetic treatment.
abstract: A mechanism of unidirectional exchange anisotropy formation at thermo-magnetic treatment of permalloy-manganese bilayers has been studied. A shift of hysteresis loops appears at annealing beginning from 230 degrees C. The maximal exchange field of 155 Oe is reached after the 250 degrees C annealing for 2 h. As demonstrated by transmission electron microscopy, the exchange bias and the coercivity growth result from an ordered anti-ferromagnetic NiFeMn phase formation due to the diffusion interaction of permalloy and manganese at annealing.
authors.affiliation: Institute of Metal Physics, Urals Branch of Russian Academy of Sciences, S. Kovalevskaya Street 18, 620990 Ekaterinburg, Russia.
authors.forename: I V
authors.initials: IV
authors.lastname: Blinov
authors.forename: T P
authors.initials: TP
authors.lastname: Krinitsina
authors.forename: S A
authors.initials: SA
authors.lastname: Matveev
authors.forename: M A
authors.initials: MA
authors.lastname: Milyaev
authors.forename: P N
authors.initials: PN
authors.lastname: Sedova
authors.forename: V V
authors.initials: VV
authors.lastname: Popov
authors.forename: V V
authors.initials: VV
authors.lastname: Ustinov