Magnetic properties of Fe-Zr-Co/Fe-Zr-Co-N multilayered films

Abstract

Fe-Zr-Co/FeZr-Co-N soft magnetic multilayered films were alternately prepared by Fe-Zr-Co alloy sputtering and electron cyclotron resonance plasma nitridation, and their magnetic properties and thermal stability were investigated. Co addition to Fe-Zr/Fe-Zr-N multilayered films was effective in improving the magnetic properties of these films. The soft magnetic properties of these films demonstrated outstanding thermal stability, and it was observed that the hyperflne field Hi,, increased up to that for pure Fe-Co alloy by heat treatment. Under the optimum preparation conditions, values for saturation flux density B, of 2.02-2.06 T, coercivity H, of 75-90 A/m, and relative permeability ,u'> 3100 (at 20 MHz) were obtained in Fes4Zr&!os/Fes4Zr&08-N and Fe76ZrsCo1dFe,6Zr&016N multilayered films after annealing at 873 K for 3.6 ks.

Effect of dopants on thermal stability and self-diffusion in iron-nitride thin films

“…results in superior thermal stability of Fe-N thin films. 15,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] These dopants either gets dissolved substitutionally into the Fe lattice or form a solid solution with Fe, which also creates some lattice distortion. Importantly, the qualifying thermodynamical variables that are required to enhance the thermal stability are high affinity (f ) and low heat of formation (∆H) of X-N as compared to Fe-N.…”

Formation of iron nitride thin films with Al and Ti additives

“…Since early 1990s to recent years, various Fe-N thin films were studied by adding a tiny amount of a third element say X, it was observed that using such additives the limitations of binary Fe-N can be reduced to a great extent. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The basic idea behind adding such element X was to chose an element which has more affinity to nitrogen than iron. When a third element X = Al, Ti, Ta, Zr etc.…”