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[Display omitted] • Y 3 Fe 5 O 12 -BaFe 12 O 19 nanocomposite film was deposited on Al 2 O 3 substrate. • High exchange spring coupling was observed between the two films. • The nanocomposite film has a high remanence ratio of 0.65. Preparation of a high remanence ratio of M-type barium ferrite film is highly desirable in self-biased microwave devices. In this letter, Y 3 Fe 5 O 12 -BaFe 12 O 19 nanocomposite film with a high remanence ratio was deposited on the Al 2 O 3 substrate. Multiple crystal structure characterizations confirm that the Y 3 Fe 5 O 12 film was grown on the orientation BaFe 12 O 19 film surface with high crystallinity and low roughness. The magnetism measurement displays that the nanocomposite film has a high remanence ratio of 0.65 for its high exchange spring coupling. Consequently, this work gives an approach to preparing ferrite film with a high remanence ratio which is applied in self-biased devices. [ABSTRACT FROM AUTHOR]

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Objective: To investigate the microvasculature and structural characteristics of the eyes of myopic patients and their association with posterior staphyloma (PS). Methods: This was a retrospective, case-control study comprising of 106 eyes from 72 individuals. Using 1:1 matching of axial length (AL) of their eyes, patients were allocated into a PS group or no posterior staphyloma (NPS) group. All patients were examined using ultra-widefield fundus imaging, optical coherence tomography angiography, and ocular biometry to acquire microvasculature and microstructure parameters. Results: The anterior chamber depth (ACD) of the PS group was significantly different from that of the NPS group (3.56 mm vs 3.76 mm, P < 0.001), as was 1ens thickness (3.72 mm vs 3.57 mm, P = 0.005) and spherical equivalent (SE)(-10.11D vs -8.80D, P = 0.014). The PS group had reduced choriocapillaris flow, subfoveal choroidal thickness (SFCT), and a thinner retinal layer compared with the NPS group. No difference in retinal blood flow between the two groups was observed. The PS group exhibited a smaller disc area (15082.89 vs 17,043.32, P = 0.003) and angle α between temporal retinal arterial vascular arcades (113.29°vs 128.39°, P = 0.003), a larger disc tilt ratio (1.41 vs 1.24, P < 0.001) and parapapillary atrophy (PPA) area (13840.98 vs 8753.86, P = 0.020), compared with the NPS group. Multivariate regression analysis indicated that disc tilt ratio (P = 0.031) and SFCT (P = 0.015) were significant predictors of PS. In addition, PS (P = 0.049), AL (P = 0.003), corneal refractive power (P < 0.001), ACD (P = 0.022), relative lens position (P = 0.045), and disc area (P = 0.011) were significant predictors of SE. Conclusions: PS was found to be closely linked to a reduction in choriocapillaris perfusion and anatomical abnormalities including posterior and anterior segments. Furthermore, PS exacerbated the progression of myopia. [ABSTRACT FROM AUTHOR]