Year: 2013
Type: article
Abstract: 50 nm thick nanogranular polycrystalline dysprosium thin films have been prepared via ultra-high vacuum direct-current sputtering on SiO 2 and Si wafers. The maximum in-plane spontaneous magnetization at T = 4 K was found to be for samples deposited on wafers heated to 350 °C with a Néel point of and a ferromagnetic (FM) transition at , measured via zero-field-cooled–field-cooled magnetization measurements, close to single-crystal values. The slightly reduced magnetization is explained in the light of a metastable face-centred cubic crystal phase which occurred at the seed interface and granularity related effects that are still noticeably influential despite an in-plane magnetic easy axis. As deposited samples showed reduced magnetization of , however their FM transition shifted to a much higher temperature of and the antiferromagnetic phase was completely suppressed probably as a result of strain.
Institutions: Queen's University Belfast, Seagate (Ireland)
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2074985661