Effect of Pt doping on the preferred orientation enhancement in FeCo/SiO2 nanocomposite films

Mei Liu,Yue Ma,Shichong Xu,Linglong Hu,Haibo Li,Ming Feng

doi:10.1038/s41598-019-47215-3

Abstract

We prepared FeCoPt/SiO2 thin films by sol-gel spin-coating technique. As-prepared composite films were reduced in hydrogen to induce texture growth. Structural, magnetic property and surface morphology of the films were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and scanning electron microscope (SEM). These experimental data indicate that integrated intensity ratio I(200)/I(110) of diffraction peaks (200) and (110) of FeCo firstly increases and then decreases, while the coercivity first decreases and then increases with increasing Pt doping content. The specimen with less Pt doping content has a large I(200)/I(110) value and small coervicity value, which is closely related with strong (200) texture in FeCo thin film. These results indicate that fcc-Pt is also in favor of promoting (200) FeCo texture like Al or Cu elements, and this similar trends of Pt and Al originate from their similar atomic radius and crystal cell volume.

Highlights

Compared with traditional materials, nanomaterials have received considerable attention due to their unique physical and chemical properties[1,2,3,4,5,6,7]
The diffracting peaks corresponding to metal platinum could not be detected which is due to the replacement of Fe or Co sites by Pt elements, since Pt is doped into FeCo alloy crystal lattices
This indicates that the film tends to present (200) preferred orientation after being doped with only small amount Pt element (0.5 wt %)

Summary

Introduction

Nanomaterials have received considerable attention due to their unique physical and chemical properties[1,2,3,4,5,6,7]. The diffracting peaks corresponding to metal platinum could not be detected which is due to the replacement of Fe or Co sites by Pt elements, since Pt is doped into FeCo alloy crystal lattices.

Results

Conclusion