K. Ishigami

Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism

BiFeO3 (BFO) shows both ferroelectricity and magnetic ordering at room temperature, but its ferromagnetic component, which is due to spin canting, is negligible. Substitution of transition-metal atoms such as Co for Fe is known to enhance the ferromagnetic component in BFO. In order to reveal the origin of such magnetization enhancement, we performed soft x-ray absorption spectroscopy (XAS) and soft x-ray magnetic circular dichroism (XMCD) studies of BiFe1−xCoxO3 (x = 0 to 0.30) (BFCO) thin films grown on LaAlO3(001) substrates. The XAS results indicated that the Fe and Co ions are in the Fe3+ and Co3+ states. The XMCD results showed that the Fe ions show ferromagnetism, while the Co ions are antiferromagnetic at room temperature. The XAS and XMCD measurements also revealed that part of the Fe3+ ions are tetrahedrally co-ordinated by oxygen ions but that the XMCD signals of the octahedrally coordinated Fe3+ ions increase with Co content. The results suggest that an impurity phase such as the ferrimagnetic...

Thickness-dependent magnetic properties and strain-induced orbital magnetic moment inSrRuO3thin films

Thin films of the ferromagnetic metal

Thickness-dependent ferromagnetic metal to paramagnetic insulator transition inLa0.6Sr0.4MnO3thin films studied by x-ray magnetic circular dichroism

{\mathrm{SrRuO}}_{3}

Observation of magnetically hard grain boundaries in double-perovskite Sr2FeMoO6

(SRO) show a varying easy magnetization axis depending on the epitaxial strain, and undergo a metal-to-insulator transition with decreasing film thickness. We have investigated the magnetic properties of SRO thin films with varying thicknesses fabricated on

Room-temperature local ferromagnetism and its nanoscale expansion in the ferromagnetic semiconductor Ge 1– x Fe x

{\mathrm{SrTiO}}_{3}

Role of doped Ru in coercivity-enhanced La0.6Sr0.4MnO3 thin film studied by x-ray magnetic circular dichroism

(001) substrates by soft x-ray magnetic circular dichroism at the Ru

Orbital magnetic moment and coercivity ofSiO2-coated FePt nanoparticles studied by x-ray magnetic circular dichroism

{M}_{2,3}

Electronic and magnetic properties of off-stoichiometric Co2MnβSi/MgO interfaces studied by x-ray magnetic circular dichroism

edge. Results have shown that, with decreasing film thickness, the film changes from ferromagnetic to nonmagnetic at around 3 monolayer thickness, consistent with previous magnetization and magneto-optical Kerr effect measurements. The orbital magnetic moment perpendicular to the film was found to be

Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1-yCo yO3 thin films

\ensuremath{\sim}0.1{\ensuremath{\mu}}_{\text{B}}/\mathrm{Ru}

Anisotropic spin-density distribution and magnetic anisotropy of strained La 1−x Sr x MnO 3 thin films: angle-dependent x-ray magnetic circular dichroism

, and remained nearly unchanged with decreasing film thickness while the spin magnetic moment decreases. A mechanism for the formation of the orbital magnetic moment is discussed based on the electronic structure of the compressively strained SRO film.