Structural and magnetic phase diagram of Tb/Fe multilayers determined by conversion electron Mössbauer spectrometry

Spin-wave excitation and Mössbauer spectrometry of amorphous interface in Tb/Fe multilayer

“…The morphology and the extension of the interfaces in relation with the substrate temperature and the deposition process are investigated by 57 Fe Mössbauer spectrometry method [9]. The study showed that perpendicular magnetic anisotropy is enhanced when the interface consists of an amorphous Fe-Tb alloy [2,10] or where the multilayers have annealed at certain temperature and duration of annealing [3,[10][11]. In this work we describe the results of our studies of Tb(48 Å)/Fe ( of 10 −7 Torr at 673 K during 6 h, we have studied their interface by exploiting the evolution of the hyperfine field distribution in function of the temperature of measurement and discuss them in the context of conclusions published in the literature [1][2][3]7,10].…”

“…The magnetic parameters in RE/Fe multilayers are iron ferromagnetism, strong anisotropy and RKKY (Ruderman-Kittel-Kasuya-Yosida) type interactions in the rare earth, ferromagnetic (ferrimagnetic) coupling between iron and light (heavy) rare earth. In Tb/Fe multilayer, the occurrence of perpendicular magnetic anisotropy in these multilayered systems depends mainly on the extensions and the nature of the interfacial Fe-Tb region [1][2][3][7][8]. The morphology and the extension of the interfaces in relation with the substrate temperature and the deposition process are investigated by 57 Fe Mössbauer spectrometry method [9].…”

“…Perpendicular magnetic anisotropy has been observed for same of them which makes them potential candidates for perpendicular magnetic recording devices [1][2][3][4][5][6]. The magnetic parameters in RE/Fe multilayers are iron ferromagnetism, strong anisotropy and RKKY (Ruderman-Kittel-Kasuya-Yosida) type interactions in the rare earth, ferromagnetic (ferrimagnetic) coupling between iron and light (heavy) rare earth.…”

Experimental study of the structural and magnetic properties of Fe/Tb multilayers

“…6,14 This is very surprising because the amorphous Fe/Tb multilayers exhibit a strong PMA at room temperature. 11,15 Here, we report on the structural and magnetic properties of Fe/Tb multilayers using x-ray diffraction ͑XRD͒, 57 Fe conversion electron Mössbauer spectrometry ͑CEMS͒ and magnetization measurements in the 4.2-300 K temperature range. The 57 Fe Mössbauer spectrometry is a suitable technique because it gives access directly to the local structure and the direction of magnetic moments of iron.…”

“…The study will be performed on Fe/Tb multilayers in a wide thickness range in order to determine the different structural and magnetic properties. Previously we have reported on a detailed structural and magnetic diagram obtained by Mössbauer spectrometry at 300 K. 15 Our aim is to correlate the detailed structure of the layers with the magnetic properties. The magnetic anisotropy of the multilayers will be analyzed in detail.…”