Back to Search Start Over

Coercivity mechanisms in nanocrystalline Sm–Co–Cu thin films: the spring effect.

Authors :
Romero, Sergio Antonio
Rodrigues Jr, Daniel
Germano, Tarsis
Cohen, Renato
de Castro, Jose´Adilson
de Campos, Marcos Flavio
Source :
Applied Nanoscience; Sep2023, Vol. 13 Issue 9, p6353-6372, 20p
Publication Year :
2023

Abstract

In magnetron sputtering, with the simultaneous deposition of SmCo and copper, it is possible for tailoring the coercive field of SmCoCu thin films. Microstructural analysis pointed out that nanocrystalline 2:17 rhombohedral phase with diameter 10–100 nm was obtained, and coercivities in the range between 3 and 8.5 kOe. These characteristics are suitable for magnetic recording. The coercivity mechanisms are discussed. The initial magnetization curve, measured in thermally demagnetized samples, is used to discuss the coercivity mechanisms. A spring effect in the samples is observed. The spring effect is due to reversible rotation of magnetization and indicates that the coercivity mechanism is nucleation or coherent rotation of single domain size nanoscale grains. Structural data refined with X-ray diffraction Rietveld analysis for Sm<subscript>2</subscript>(Co,Cu)<subscript>17</subscript> rhombohedral phase, Sm(Co,Cu)<subscript>5</subscript> phase and cubic oxide Sm<subscript>2</subscript>O<subscript>3</subscript> phase are provided. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21905509
Volume :
13
Issue :
9
Database :
Complementary Index
Journal :
Applied Nanoscience
Publication Type :
Academic Journal
Accession number :
172970561
Full Text :
https://doi.org/10.1007/s13204-023-02931-1