Abstract
The impact of the phase transition between para- and ferromagnetic states of Tb on the magnetic properties of Fe/Tb multilayers has been studied by taking low temperature Mössbauer measurements. 26 Fe/Tb multilayer samples with a wide range of thickness were fabricated by planar magnetron sputtering on polyester and glass substrates. The magnetic and structural properties of these samples were examined using x-ray diffraction, Mössbauer spectroscopy, and torque magnetometry. At room temperature, Mössbauer spectra show perpendicular magnetic anisotropy (PMA) of the Fe magnetic moments for samples that consist of Fe layers and mixed interfaces only. The formation of an unmixed Tb layer starting at about 12 Å Tb layer thickness leads to parallel alignment of the Fe magnetic moments. For samples for which discrete Tb layers are formed, these Tb layers are probably paramagnetic at room temperature as can be deduced from low temperature Mössbauer measurements and room temperature torque measurement. The hyperfine field of Fe in these multilayers as determined from Mössbauer spectroscopy shows a relative minimum around the Curie temperature of Tb of 220 K indicating reorientation of the Fe moments due to spin polarization of Tb.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
