Sputtered NiFeZr as a soft biasing layer in MR head

Choukh, A.M.

doi:10.1109/20.538919

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…of Zr. Even though the anisotropy field has been widely studied as a function of thickness, substrate temperature, or annealing time [8], the dependence of the anisotropy field with Zr substitution in Permalloy is given for the first time in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

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Frequency-dependent complex permeability in Zr-substituted permalloy thin films

Youssef¹,

Jacquart

Vukadinovic

2002

IEEE Trans. Magn.

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In this work, we investigate Zr substitution in Permalloy Ni 80 Fe 20 thin films in order to control the magnetic properties and then to tune the resonance frequency at lower values with high permeability levels. The structural transition from a crystalline to an amorphous phase, saturation induction, in-plane anisotropy, electrical resistivity, and frequency-dependent permeability are studied for the Zr content ranging from 0 to 17% at. The high-frequency permeability of these (Ni 80 Fe 20 ) 1 Zr films is first measured in the 0.1-3-GHz range using a permeameter. Assuming a gyroresonance mechanism, the frequency-dependence of the permeability is studied as a function of the magnetization, anisotropy field, and damping parameter deduced from ferromagnetic resonance characterizations. For a Zr concentration of 17%, a resistivity of 260 cm is obtained as well as very soft properties ( 0 5 Oe). We also show that the permeability is drastically affected by the Zr substitution with a significant shift of the resonance frequency from 600 to 300 MHz, which correlates with the decrease of the saturation induction and a very low anisotropy.

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Section: Resultsmentioning

confidence: 99%

“…axial anisotropy with an out-of-plane component prevents from reaching resonance frequency below 1 GHz [6]. A few studies [7], [8] of ternary Ni-Fe-Zr alloys only dealt with static properties for soft biasing films in magnetoresistive sensors.…”

Section: Introductionmentioning

confidence: 98%

Frequency-dependent complex permeability in Zr-substituted permalloy thin films

Youssef¹,

Jacquart

Vukadinovic

2002

IEEE Trans. Magn.

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“…Amorphous NiFeZr (a-NiFeZr) phase also displays soft magnetic properties and is seldom reported in films [9,10]. Magnetization and ferromagnetic resonance measurements were used to investigate the magnetic properties of the Ni 81 Fe 19 /Zr multilayers.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties and Electronic Structure of Ni81Fe19/Zr Multilayer Films

Yamkane¹,

Lassri²,

Omari³

et al. 2012

J Supercond Nov Magn

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Magnetic properties of NiFe/Zr multilayer films, prepared by DC magnetron sputtering, have been studied by vibrating sample magnetometer and ferromagnetic resonance (FMR). Spin-wave resonances were observed in Ni 81 Fe 19 /Zr multilayer films in FMR experiments, and the spin wave was found to be sustained by both the whole films. Estimated small interlayer coupling constant shows weak exchange coupling effect between NiFe layers across Zr spacers. The FMR linewidth, in parallel geometry, of the uniform mode was found to increase with decreasing NiFe thickness (20 Å ≤ t NiFe ≤ 120 Å) indicating that it corresponds to an interfacial effect. In addition, electronic and magnetic properties of multilayers are investigated by selfconsistent ab initio calculations based on Korringa-KohnRostocker (KKR). Spin polarized within the framework of the Coherent Potential Approximation (CPA) is considered for calculations.

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“…Amorphous NiFeZr displays interesting magnetic properties but is seldom observed in thin films [9,10]. On the other hand, Ni 81 Fe 19 /Zr multilayers should be relatively easy to prepare.…”

Section: Introductionmentioning

confidence: 99%