Magnetic properties of phase-separated (Ni/sub 80/Fe/sub 20/)/sub 1-x/Mn/sub x/ thin films

Abstract

Ni 80 Fe 20 ) 1 Mn alloy thin films were produced by codepositing Ni 80 Fe 20 and Mn and annealed at 300 C-600 C. In spite of the structural stability predicted by the bulk phase diagram and the interdiffusion evidences observed in the magnetic exchange couples, the (Ni 80 Fe 20 ) 1 x Mn x alloy films decomposed into Ni 80 Fe 20 and Mn phases when annealed above 400 C. The phase separated structure closely resembles those of magnetic granular alloys with a strong crystallographic texture. The phase-separated alloys exhibit an inverse giant magnetoresistance as high as 0.5%.

Exchange-bias via nanosegregation in novel Fe2−xMn1+xAl (x = −0.25, 0, 0.25) Heusler films

“…8 These systems have been shown to work at room temperature 9 and have been proposed for spintronics applications. Suitable morphologies comprise: (i) core-shell nanoparticles obtained by mechanical milling, 10 thermal decomposition 11 and different chemical routes; [12][13][14] (ii) magnetic nanoparticles embedded in AFM matrices obtained by cluster beam deposition, [15][16][17] selective reduction 18 and co-sputtering; 19 and (iii) phase segregated alloys obtained by mechanical 20 and thermal [21][22][23] treatments.…”

EFFECT OF HEAT TREATMENT ON THE PHASE COMPOSITION AND MAGNETIC PROPERTIES OF SINGLE-LAYER NANOSTRUCTURES (Ni80Fe20)0.6Mn0.4

“…Данная упорядоченная фаза была получена при помощи термомагнитной обработки двухслойных пленок, содержащих слои пермаллоя и марганца[7]. Авторы работ[8,9] пытались получить эту фазу путем отжига однослойных пленок состава (Ni 80 Fe 20 ) 1-x Mn x при концентрации марганца в диапазоне (5-60) ат. %.…”