Interfacial magnetic coupling and the confinement effect of spin electrons for τ-MnAl/Ni multilayers
Publication date: Available online 6 November 2019Source: Physics Letters AAuthor(s): Xianmin Zhang, Junwei Tong, Linrui Li, Liuxia Ruan, Fubo Tian, Gaowu QinAbstractThe interface energy and magnetic coupling of τ-MnAl/Ni were studied by first-principles calculations. It was found that τ-MnAl/Ni with Al terminal would be more steady. The magnetic coupling between τ-MnAl film and Ni films oscillated with increasing the thickness of Ni layer. Moreover, the couplings of τ-MnAl/Ni were ferromagnetic and antiferromagnetic when the number of Ni layers were even and odd, respectively. Based on the Fermi surface and energy band analysis, the observed oscillation was attributed to the quantum well states that formed by the confinement of the spin up and spin down band with Δ1 symmetry at Γ‾ point of Ni. The study is valuable for the understanding of direct magnetic coupling among magnetic multilayers and useful for the design of future spintronics devices.
CONCLUSION: Prevalence of antibiotic use was high not only versus other hospitals in the region but globally including Africa, coupled with significant evidence of sub-optimal prescribing. Swift action is needed to improve future prescribing to reduce AMR. One or two areas should initially be targeted for quality improvement including development of local guidelines, documentation of antibiotic indications and/or stop/review dates. PMID: 33034234 [PubMed - as supplied by publisher]
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Authors: Hammerschlag MR, Sharma R Abstract INTRODUCTION: Azithromycin was recommended as the first-line therapeutic regimen for treatment of genital infections in men and women by the Centers for Disease Control in 1998. A series of studies of azithromycin for treatment of rectal chlamydial infection in men who have sex with men (MSM) found that azithromycin was significantly less effective than doxycycline. AREAS COVERED: Literature on treatment of rectal C. trachomatis from 2000 through May 2020 was searched using PubMed. Retrospective and observational studies were identified documenting the frequency and t...
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