Theoretical methods for understanding advanced magnetic materials: The case of frustrated thin films

Title: Theoretical methods for understanding advanced magnetic materials: The case of frustrated thin films
Authors: H.T. Diep
Keywords: Theory of magnetism;Surface spin waves;Magnetic thinfilms;Frustrated spin systems;Magnetic materials;Phase transition;Monte Carlo simulation;Statistical physics
Issue Date: 2016
Publisher: ĐHQGHN
Abstract: Materials science has been intensively developed during the last 30 years. This is due, on the one hand, to an increasing demand of new materials for new applications and, on the other hand, to technological progress which allows for the synthesis of materials of desired characteristics and to investigate their properties with sophisticated experimental apparatus. Among these advanced materials, magnetic ma-terials at nanometric scale such as ultra thinfilms or ultrafine aggregates are no doubt among the most important for electronic devices. In this review, we show advanced theoretical methods and solved examples that help understand microscopic mechanisms leading to experimental observations in magnetic thin films. Attention is paid to the case of magnetically frustrated systems in which two or more magnetic interactions are present and competing. The interplay between spin frustration and surface effects is the origin of spectacular phenomena which often occur at boundaries of phases with different symmetries: reentrance, disorder lines, coexistence of order and disorder at equilibrium. These phenomena are shown and explained using of some exact methods, the Green's function and Monte Carlo simulation. We show in particular how to calculate surface spin-wave modes, surface magnetization, surface reorientation transition and spin transport
Description: p. 31-44
ISSN: 2468-2284
Appears in Collections:Advanced Materials and Devices

Nhận xét

Bài đăng phổ biến từ blog này

Xác định kim loại nặng trong thực phẩm bằng phương pháp phổ khối lượng cao tần cảm ứng Plasma ICP-MS : Luận văn ThS. Hóa học: 60 44 29

Phát hiện gián tiếp đột biến gen EGFR trong ung thư biểu mô tuyến của phổi bằng kỹ thuật hóa mô miễn dịch: Luận văn ThS. Công nghệ nano sinh học (chuyên ngành đào tạo thí điểm)

Hoàn thiện mô hình dự án liên kết giữa nhà trường và doanh nghiệp nhằm nâng cao chất lượng đào tạo nhân lực công nghệ cho doanh nghiệp (Nghiên cứu trường hợp Trường Đại học FPT và Công ty TNHH Phần mềm FPT)