High <inline-formula> <tex-math notation="LaTeX">$K_{{{u}}}$ </tex-math></inline-formula> and Low Intergranular Exchange Coupling of Postannealed CoPt-WO₃ Granular Film

Effects of utilizing a granular nucleation layer on magnetic properties and microstructure of CoPt–B2O3 granular medium

“…This result indicates that the employment of an NL with appropriate thickness is considerably effective for increasing H c and the NL thickness at which each oxide shows the peak of H c decreases when an oxide with higher T m is employed. The possible origin of H c at various d NL values in the granular medium is the existence of an inhomogeneous structure in the medium 13,[18][19][20] or the noncoherent magnetic reversal mode [21][22][23] or the change in the degree of thermal stability 24,25) or intergranular exchange coupling. [26][27][28][29] In accordance with the result in the previous section, each magnetic grain grows columnarly with c-plane sheet texture orientation such that the existence of an inhomogeneous structure in the medium and the noncoherent magnetic reversal mode are not the primary issues for the granular medium.…”

B2O3: Grain boundary material for high-Ku CoPt–oxide granular media with low degree of intergranular exchange coupling

“…In the in-plane profiles, diffractions at Bragg angles (2θ χ ) of around 40 and 73°for the granular media with MnO, TiO It was previously reported that the integral intensity ratios of (10.0) and (11.0) diffractions corrected by the Lorentz and atomic scattering factors are related to the amount of stacking faults (SFs) in the granular media. 21,22) Here, SFs are expressed by the existence probability of fcc stacking (-A-B-C-A-B-C-stacking) between hcp stackings (-A-B-A-B-stacking) of CoPt grains (P fcc ). Figure 7 shows the dependences of P fcc on the ÁG Co3O4Oxide at T m of 450 °C and ÁG Co3O4Oxide f of 400 kJ=mol O 2 , P fcc is approximately 1.6%.…”