Ảnh hưởng của biến động spin đối với các tính chất từ của màng siêu mỏng euo

• Ngôn ngữ: vie
• Ký hiệu phân loại: 538.4 Magnetic substances and their characteristic phenomena
• Thông tin xuất bản: Communications in Physics, 2013
• Mô tả vật lý: 235-240
• Bộ sưu tập: Metadata
• ID: 565104

Tóm tắt

The Gaussian spin fluctuation theory is applied to study magnetic properties (Curie temperature, magnetization) of EuO ultra-thin films within nearest neighbor and next nearest neighbor exchange approximation. The dependence of Curie temperature on the thickness of the free EuO ultra-thin film is calculated and compared with the results of the other mean field methodconstant coupling approximation. The effect of nearly independence of saturation magnetization on the EuO films thickness can be explained by controlling the next nearest neighbor exchange in presence of substrates.