The role of low Gd concentrations on magnetisation behaviour in rare earth:transition metal alloy films

Inyang, O.; Rafiq, A.; Swindells, C.; Ali, S.; Atkinson, D.

doi:10.1038/s41598-020-66595-5

The role of low Gd concentrations on magnetisation behaviour in rare earth:transition metal alloy films

Journal Article · Wed Jun 17 04:00:00 EDT 2020 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-020-66595-5· OSTI ID:1816865

Inyang, O. ^[1]; Rafiq, A. ^[2]; Swindells, C. ^[3]; Ali, S. ^[4]; Atkinson, D. ^[3]

Durham Univ. (United Kingdom). Dept. of Physics; OSTI
Durham Univ. (United Kingdom). Dept. of Physics; Government College Univ., Lahore (Pakistan). Dept. of Physics
Durham Univ. (United Kingdom). Dept. of Physics
Government College Univ., Lahore (Pakistan). Dept. of Physics; Riphah International Univ., Lahore (Pakistan). Dept. of Physics

The magnetisation reversal behaviour as a function of composition was studied in low rare earth concentration alloys. 30 nm thick rare earth:transition-metal films of composition GdxCo_100-x, GdxFe_100-x and Gd_x(Co₅₀Fe₅₀)_100-x were prepared by magnetron sputtering, where x ranged from 4 to 13 atomic%. Magnetisation behaviour was studied using MOKE and Hall hysteresis measurements. The magnetic reversal behaviour as a function of Gd content is strongly dependent on the transition metal. With increasing Gd content the film structure transitions from crystalline to amorphous and the saturation magnetisation decreases linearly. For GdCo, the reversal field, Hc, increases by less than a factor of two with Gd doping of 11%, while for Fe, the coercivity falls by a factor of ten with 8% Gd. This may be attributed to changes in the crystalline morphology. GdCoFe shows a similar trend with Gd doping for the in-plane reversal field to that of GdFe. With 13% Gd in Fe there is evidence indicating the presence of a weak perpendicular magnetic anisotropy, PMA. With Gd doping the anomalous Hall resistivity of Co, Fe and CoFe increases significantly with the largest increase observed for GdCoFe.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1816865

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 10; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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