TY - JOUR
T1 - MFM observation of perpendicular magnetization and antiferromagnetically coupled domains in Co/Ru superlattices
AU - Hamada, S.
AU - Himi, K.
AU - Okuno, T.
AU - Takanashi, K.
N1 - Funding Information:
SH and TO would like to thank S. Isoda, T. Nemoto, T. Yaji (Inst. for Chem. Res. (ICR)), and R. Haßdorf (CAESAR, Germany) for technical support in MFM measurements. We thank K. Mibu (ICR), T. Kawagoe (JRCAT-ATP, Japan) for useful discussions, and also T. Shinjo (ICR), H. Fujimori (Res. Inst. for Electric and Magnetic Materials, Japan) for continuous encouragement. SH thanks the Japan Society for the Promotion of Science for financial support.
PY - 2002/2
Y1 - 2002/2
N2 - The Co(m ML)/Ru(n ML) superlattice systems, where m and n are integers (=1-5) and ML means monolayer, show a drastic transition of the Co spin structure, depending on m and n: interlayer ferromagnetic (F) and antiferromagnetic (AF) spin alignments with perpendicular magnetization. We have succeeded in the observation of magnetic microstructures much different between the F and AF coupled multilayer films by means of magnetic force microscopy. Interconnected and segmented stripe domains, which are typical for a ferromagnetic thin film with perpendicular anisotropy, are observed for the F coupled films with their stripe widths around 80nm. On the other hand, antiferromagnetically coupled domains (i.e., laterally ferromagnetic domains but with interlayer antiparallel coupling with perpendicular magnetization) are observed for the AF coupled films. The shape of domains for the AF coupled films is rather irregular, and the size exceeds 1μm typically.
AB - The Co(m ML)/Ru(n ML) superlattice systems, where m and n are integers (=1-5) and ML means monolayer, show a drastic transition of the Co spin structure, depending on m and n: interlayer ferromagnetic (F) and antiferromagnetic (AF) spin alignments with perpendicular magnetization. We have succeeded in the observation of magnetic microstructures much different between the F and AF coupled multilayer films by means of magnetic force microscopy. Interconnected and segmented stripe domains, which are typical for a ferromagnetic thin film with perpendicular anisotropy, are observed for the F coupled films with their stripe widths around 80nm. On the other hand, antiferromagnetically coupled domains (i.e., laterally ferromagnetic domains but with interlayer antiparallel coupling with perpendicular magnetization) are observed for the AF coupled films. The shape of domains for the AF coupled films is rather irregular, and the size exceeds 1μm typically.
KW - Antiferromagnetically coupled domains
KW - Interlayer antiferromagnetic coupling
KW - Magnetic force microscopy
KW - Magnetization curves
KW - Micromagnetic structures
KW - Multilayer films
KW - Perpendicular magnetic anisotropy
UR - http://www.scopus.com/inward/record.url?scp=0036464753&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036464753&partnerID=8YFLogxK
U2 - 10.1016/S0304-8853(01)00864-2
DO - 10.1016/S0304-8853(01)00864-2
M3 - Article
AN - SCOPUS:0036464753
SN - 0304-8853
VL - 240
SP - 539
EP - 542
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 1-3
ER -