# Fileset

[2025 ogawa APL Supplementary.pdf](https://mdr.nims.go.jp/filesets/f558a82e-953e-4d2e-b563-da92e8d83129/download)

## Creator

[Daisuke Ogawa](https://orcid.org/0000-0002-4373-6435), [Yuma Iwasaki](https://orcid.org/0000-0002-7117-277X), [Jun Uzuhashi](https://orcid.org/0000-0003-2023-8158), [Yuta Sasaki](https://orcid.org/0000-0002-9192-4799), Masato Kotsugi, [Yukiko K. Takahashi](https://orcid.org/0000-0001-9197-7236)

## Rights

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Daisuke Ogawa, Yuma Iwasaki, Jun Uzuhashi, Yuta Sasaki, Masato Kotsugi, Yukiko K. Takahashi; Er-driven magnetic tunability in FePt thin films investigated via high-throughput experiments and microstructure analysis for future HAMR media. Appl. Phys. Lett. 23 June 2025; 126 (25): 252405 and may be found at https://doi.org/10.1063/5.0273511. [In Copyright](http://rightsstatements.org/vocab/InC/1.0/)

## Other metadata

[Er-driven magnetic tunability in FePt thin films investigated via high-throughput experiments and microstructure analysis for future HAMR media](https://mdr.nims.go.jp/datasets/7e7a6053-dcc9-4024-836f-d6089f2bd883)

## Fulltext

SUPPLEMENTAL MATERIALEr-driven magnetic tunability in FePt thin films investigated viahigh-throughput experiments and microstructure analysis for futureHAMR mediaD. Ogawa,1, ∗ Y. Iwasaki,2 J. Uzuhashi,1 Y. Sasaki,1 M. Kotsugi,3 and Y. K. Takahashi1, †1National Institute for Materials Science, Tsukuba 305-0047, Japan2Center for Basic Research on Materials (CBRM),National Institute for Materials Science (NIMS), Tsukuba 305-0047, Japan3Department of Materials Science and Technology,Tokyo University of Science, Tokyo 125-8585, Japan001002110MgO sub. (001)Out of planeq // MgO[110](110)FePt(FePt)-Er0.35FIG. S1. Out-of-plane XRD patterns of FePt thin films without Er and with a 0.35 at.% Er addition. Theinset shows the (110) peaks of the L10-FePt for both films, where the (110) peaks were measured with thescattering vector q aligned parallel to subsgrate of MgO[110](110).1TABLE S1: The additive elements, sputtering power input for each target, deposition time, and depositionposition as shown in Fig. 1(a), x and y in the composition formula (FexPt100−x)100−yXy (X = Er, Tm)as estimated by XRF, film thickness as estimated by XRR, lattice constant c as estimated by XRD, L10ordering parameter, Ms as measured by VSM, Tc as estimated by SQUID-VSM, and Hk as estimated bydynacool were listed for each sample respectively.ID X Power [W] time posi. (FexPt100−x)100−yXy Thickness Crystal structure Magnetic propertiesFe Pt X [sec] No. x y t [nm] c [nm] S M s [T] T c [K] Hk [T]1 - 40 15 0 1800 11 50.76 0.00 30.241 0.3724 0.9264 1.394 679.27 10.002 Er 150 56 5 480 5 47.50 0.19 34.273 0.3746 0.5024 1.4023 Er 150 56 5 480 2 59.62 0.24 32.657 0.3751 0.4557 1.4104 Er 60 23 5 1200 11 54.72 0.30 32.204 0.3705 0.9284 1.5295 Er 60 23 5 1200 8 51.44 0.35 31.471 0.3707 0.9557 1.536 715.55 11.806 Er 40 15 5 1800 11 56.20 0.46 30.637 0.3711 0.9013 1.447 10.457 Er 40 15 5 1800 8 49.57 0.53 29.566 0.3715 0.9584 1.503 688.44 10.138 Er 40 15 10 1800 11 51.98 0.91 32.086 0.3711 0.8367 1.3599 Er 40 15 10 1800 8 52.61 1.05 31.605 0.3713 0.816 1.367 667.95 10.0410 Er 40 15 10 1800 5 49.00 1.42 29.359 0.3777 0.3423 1.128 2.6011 Er 40 15 10 1800 2 45.41 1.80 27.925 0.3766 0.4557 1.120 579.1 5.8812 Er 40 15 20 1800 11 52.32 1.80 32.104 0.3753 0.4015 1.13613 Er 40 15 20 1800 8 55.70 2.08 30.812 0.3775 0.3102 1.27814 Er 40 15 20 1800 5 38.53 2.81 30.388 0.3797 0.384 0.992 585.68 6.4315 Er 40 15 20 1800 2 49.08 3.53 29.325 0.3819 0.3506 0.878 556.83 6.2816 Tm 150 56 5 640 11 55.42 0.19 48.187 0.3724 0.5757 1.17417 Tm 150 56 5 640 8 57.47 0.24 47.017 0.3744 0.4355 1.10418 Tm 150 56 5 640 5 47.88 0.24 44.779 0.3716 0.9616 1.32319 Tm 150 56 5 640 2 53.95 0.31 42.711 0.371 0.9207 1.31120 Tm 40 15 5 2400 11 52.82 0.71 39.656 0.3716 0.9101 1.334 703.09Continued on next page∗ Corresponding author: d.ogawa@shinetsu.jp† Corresponding author: TAKAHASHI.Yukiko@nims.go.jp2Table S1 continued from previous pageID X Power [W] time posi. (FexPt100−x)100−yXy Thickness Crystal structure Magnetic propertiesFe Pt X [sec] No. x y t [nm] c [nm] S M s [T] T c [K] Hk [T]21 Tm 40 15 5 2400 8 56.14 0.88 38.47 0.3728 0.6584 1.27822 Tm 40 15 5 2400 5 48.05 0.88 37.104 0.3752 0.7616 1.15823 Tm 40 15 5 2400 2 47.78 1.15 35.358 0.3744 0.7471 1.17024 Tm 40 15 10 2400 11 53.52 1.42 40.79 0.3727 0.7443 1.27825 Tm 40 15 10 2400 8 53.49 1.74 40 0.3726 0.6715 1.248 9.7926 Tm 40 15 10 2400 5 51.93 1.75 38.471 0.3757 0.5771 1.13627 Tm 40 15 10 2400 2 46.17 2.28 35.854 0.3755 0.5391 1.177 6.2828 Tm 40 15 20 2400 11 55.20 2.79 41.744 0.60329 Tm 40 15 20 2400 8 53.96 3.43 41.339 0.78030 Tm 40 15 20 2400 5 51.35 3.44 41.263 0.64431 Tm 40 15 20 2400 2 48.35 4.46 39.543 0.383 0.3757 0.4823