Exchange coupling of bilayers and synthetic antiferromagnets pinned to MnPt

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Rickart, M (Author) Other; Guedes, A (Author) Other; Negulescu, B (Author) Other; ventura, j. (Author) Other; sousa, j. b. (Author) FCUP; Diaz, P (Author) Other; MacKenzie, M (Author) Other; Chapman, JN (Author) Other; Freitas, PP (Author) Other

Journal

Title: European Physical Journal B

Vol. 45

Pages: 207-212

ISSN: 1434-6028

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 14 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-000-3HV

DOI: 10.1140/epjb/e2005-00051-5

Abstract (EN): Exchange bias and blocking temperature were studied in MnPt based bottom-pinned bilayers and synthetic antiferromagnets (SAF) prepared by magnetron sputtering. The structure and magnetic properties were determined as a function of the MnPt layer thickness. Exchange coupling was found to be (J(ex) = 0.4 erg/cm(2)) for a MnPt ( t <= 20 nm)/ CoFe (5 nm) bilayer. The distribution of the blocking temperature T-B was analyzed and its width Delta T-B and center point T-B,T-center determined. T-B is about 280 degrees C for thinner MnPt films, and increases to 330 degrees C for thick films. Delta T-B is constant for thick MnPt but steadily increases as the thickness decreases. SAF structures show higher exchange bias and higher T-B,T-center at thin layer thickness (t(MnPt) = 8.5 nm) compared to bilayers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6