Separation of exchange anisotropy and magnetocrystalline anisotropy in Co/CoO bilayers by means of ac susceptibility measurements
2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 76, no 14Article in journal (Refereed) Published
In Co/CoO bilayers separation of the unidirectional anisotropy energy from crystalline anisotropy is accomplished with the temperature variation of the ac susceptibility from room temperature to 4.2 K. Measurements above the blocking temperature of the CoO layer give a clear measure of crystalline anisotropy in the Co. At 4.2 K 85% of the total anisotropy is from K-ud while the anisotropy of the Co layer only contributes about 15%. The small crystalline anisotropy energy does not account for the large difference between the exchange anisotropy determined by ac susceptibility and hysteresis loops.
Place, publisher, year, edition, pages
2007. Vol. 76, no 14
magnetic anisotropy, bias, magnetoresistance, dependence, fe/fef2
IdentifiersURN: urn:nbn:se:kth:diva-17091DOI: 10.1103/PhysRevB.76.144416ISI: 000250620300066ScopusID: 2-s2.0-35348899521OAI: oai:DiVA.org:kth-17091DiVA: diva2:335134
QC 201005252010-08-052010-08-05Bibliographically approved