Structural and transport properties of Fe/Ti multilayers

Abstract

Fe/Ti metallic multilayers with an average Fe3?Ti6, composition have been studied by x-ray diffraction, Mossbauer spectroscopy and electrical resistivity as a function of period. For small periods. broad diffraction peaks characteristic of a disordered, amorphous-like structure are observed, although composition modulation still exists along the growth direction. Beyond A = 4 nm, crystalline Ti appears with a BCC structure. It then reverts to its stable Hcpform for A = 6 nm. with its c axis along the growth direction. At aperiod of 8 nm. the iron-rich layer in turn crystallises. This correlates to a sudden decrease of the electrical resistivity. The appearance of this Fe-rich RCC phase, corresponding to the onset of magnetic ordering in the Mossbauer spectra, induces a change in the texture of the titanium layer, the c axis now lying preferentially in the plane. Anomalies in both the lattice parameters and size of the crystallitesoccur from this period up to about 12 nm. whereas a plateau is observed for the electrical resistivity. For larger periods, the Ti content of the Fe-rich BCC phase decreases, corresponding to the further decrease of the electrical resistivity and increase of both hyperfine field and magnetic contribution in the Mossbauer spectra.

Structural and Magnetic Properties of Ni0.8Fe0.2/Ti Nanoscale Multilayers

“…This causes the expansion of the lattice at the Py-Ti interface, where FeNiTi 2 is created. This effect created by the diffusion of Ti has been previously reported in similar systems such as Ti/Fe [ 23 ] and Ti/Ni [ 24 ].…”

“…Regarding the Ti layer, the [010] texture disappears in benefit of the [002] direction and the possible appearance of Ti bcc. The presence of Ti bcc as well as the changes in Ti texture have been previously observed in Fe/Ti multilayers [ 23 ].…”

Soft X-Ray Resonant Magnetic Scattering from a Magnetically Coupled Ag/Ni Multilayer

“…The Ag/Ni multilayer has been prepared by dc sputtering onto a glass substrate kept at 100 K during the depositon process [11]. The Ag layers are 11 A thick and the thickness of the Ni ones, 17.5 A, has been chosen so that the magnetic saturation field (600 G) [7] is in the range of our magnetic device and that the Curie temperature (-610 K) [12] is as high as that of bulk Ni, since our scattering measurements could be performed only at room temperature.…”

Elastic Properties and Structural Evolution of AgNi Superlattices

“…Multilayered samples were prepared by dc sputtering as explained in a previous paper [3]. Glass substrates 2.8 mm x 20 mm were used.…”