Tuning the magnetic properties of Fe thin films with RF-sputtered amorphous carbon

Shoug Alghamdi, Timothy Moorsom, Fatma Al Ma'Mari, Alistair Walton, Zabeada Aslam, Mannan Ali, Bryan J. Hickey, Oscar Cespedes*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

ملخص

RF-sputtered amorphous carbon (a-C) offers a simple and cheap pathway to tune the magnetic properties of transition metal thin films for magnetic memories and different spintronic applications. This paper describes changes in the magnetic properties of iron thin films with a-C overlayers. In as-deposited samples, hybridisation and intermixing at the Fe/a-C interface leads to magnetic softening (Liu et al., 2006) [1], with a reduction in the coercive field (Hc) up to a factor of five for Fe/a-C/Fe trilayers, and a 10–30% lower saturation magnetization as a function of the metal film thickness. After annealing at 500 °C, inter-diffusion and graphitization of the carbon layer results in up to a factor five increased coercivity due to increased pinning as shown via Kerr microscopy. Therefore, RF-sputtered carbon overlayers and post-processing can tune the anisotropy and domain configuration of metallic thin films in a synthesis methodology that is simple, cheap and sustainable.

اللغة الأصليةEnglish
رقم المقال169461
دوريةJournal of Magnetism and Magnetic Materials
مستوى الصوت557
المعرِّفات الرقمية للأشياء
حالة النشرPublished - سبتمبر 1 2022

ASJC Scopus subject areas

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