Title :
Magnetic and electronic states of a monatomic Fe(001) layer facing an epitaxial MgO(001) tunnel barrier studied by using XAS and XMCD measurements
Author :
Miyokawa, K. ; Saito, S. ; Kamino, T. ; Hanashima, K. ; Saito, T. ; Katayama, T. ; Suzuki, Y. ; Mamiya, K. ; Koide, T. ; Yuasa, S.
Author_Institution :
Dept. of Phys., Toho Univ., Chiba, Japan
Abstract :
Epitaxial multilayers with structure of bcc-Co(001)(6 ML)/bcc-Fe(001)(1 or 2 ML)/MgO(001)(20 Å) were prepared by using molecular beam epitaxy (MBE) with in-situ RHEED observation. Magnetic moments of the 1 and 2 ML-Fe layers evaluated using the sum rules from the energy integration of the XAS and XMCD spectra were found to be considerably higher than that of bulk Fe.
Keywords :
X-ray absorption spectra; cobalt; iron; magnesium compounds; magnetic circular dichroism; magnetic epitaxial layers; magnetic moments; magnetic multilayers; molecular beam epitaxial growth; reflection high energy electron diffraction; tunnelling magnetoresistance; 20 angstrom; Co-Fe-MgO; MBE; RHEED; XAS; XMCD; electronic states; epitaxial multilayers; epitaxial tunnel barrier; magnetic moments; magnetic states; molecular beam epitaxy; monatomic layer; sum rules; Amorphous magnetic materials; Crystallization; Iron; Magnetic moments; Magnetic separation; Magnetic tunneling; Oxidation; Production facilities; Temperature sensors; Tunneling magnetoresistance;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464448
