Soft x-ray Magnetic Circular Dichroism spectroscopy at the Dy and Tb M4,5 and the Fe L2,3 edges was performed on a sputter deposited polycrystalline Terfenol-D (Tb0.3Dy0.7Fe2) film on sapphire substrates at temperatures from 100 to 300 K to evaluate the elementwise contribution to the magnetocrystalline anisotropy and coercive field. The elemental spin and orbital magnetic moments were calculated using the x-ray Magnetic Circular Dichroism sum rules. As temperatures decreased, the Tb and Fe moments plateau at 200 K with values of 7.6 μB/atom and 1.8 μB/atom, respectively, while the Dy moment increases to 8.9 μB/atom at 100 K. Between 300 and 200 K, the change in magnetic anisotropy is dominated by thermally induced magnetoelastic effects while for temperatures below 200 K magnetocrystalline anisotropy (MCA) changes are dominant. The MCA changes below 200 K appear to be due to increases in the Dy orbital moment with decreasing temperature in this temperature regime.
Shirazi, Paymon, et al. "Rare-earth orbital moment contributions to the magnetic anisotropy in magnetostrictive Tb0.3Dy0.7Fe2." Applied Physics Letters, vol. 118, no. 16, Apr. 2021. https://doi.org/10.1063/5.0049326
Shirazi, Paymon, Lee, Taehwan, Panduranga, Mohanchandra K., N'Diaye, Alpha T., Barra, Anthony, & Carman, Gregory P. (2021). Rare-earth orbital moment contributions to the magnetic anisotropy in magnetostrictive Tb0.3Dy0.7Fe2. Applied Physics Letters, 118(16). https://doi.org/10.1063/5.0049326
Shirazi, Paymon, Lee, Taehwan, Panduranga, Mohanchandra K., et al., "Rare-earth orbital moment contributions to the magnetic anisotropy in magnetostrictive Tb0.3Dy0.7Fe2," Applied Physics Letters 118, no. 16 (2021), https://doi.org/10.1063/5.0049326
@article{osti_1778436,
author = {Shirazi, Paymon and Lee, Taehwan and Panduranga, Mohanchandra K. and N'Diaye, Alpha T. and Barra, Anthony and Carman, Gregory P.},
title = {Rare-earth orbital moment contributions to the magnetic anisotropy in magnetostrictive Tb0.3Dy0.7Fe2},
annote = {Soft x-ray Magnetic Circular Dichroism spectroscopy at the Dy and Tb M4,5 and the Fe L2,3 edges was performed on a sputter deposited polycrystalline Terfenol-D (Tb0.3Dy0.7Fe2) film on sapphire substrates at temperatures from 100 to 300 K to evaluate the elementwise contribution to the magnetocrystalline anisotropy and coercive field. The elemental spin and orbital magnetic moments were calculated using the x-ray Magnetic Circular Dichroism sum rules. As temperatures decreased, the Tb and Fe moments plateau at 200 K with values of 7.6 μB/atom and 1.8 μB/atom, respectively, while the Dy moment increases to 8.9 μB/atom at 100 K. Between 300 and 200 K, the change in magnetic anisotropy is dominated by thermally induced magnetoelastic effects while for temperatures below 200 K magnetocrystalline anisotropy (MCA) changes are dominant. The MCA changes below 200 K appear to be due to increases in the Dy orbital moment with decreasing temperature in this temperature regime.},
doi = {10.1063/5.0049326},
url = {https://www.osti.gov/biblio/1778436},
journal = {Applied Physics Letters},
issn = {ISSN 0003-6951},
number = {16},
volume = {118},
place = {United States},
publisher = {American Institute of Physics},
year = {2021},
month = {04}}
Conference
·
Sun Oct 31 23:00:00 EST 1993
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
·OSTI ID:6837291