在表轴三层Co/NiO/Fe三层中转移磁性异构性
M Szpytma1, M Ślęzak2, W Janus2
1Faculty of Physics and Applied Computer Science, AGH University of Krakow, Krakow, Poland. mszpytma@agh.edu.pl.
Scientific reports
|January 19, 2024
概括
研究了Co/NiO/Fe三层中的磁性合. 铁层中的旋转重定向过渡影响了Co和NiO的磁性,证明了强大的界面交换合.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 表面科学是一门学科.
背景情况:
- 了解界面磁性合对于自旋电子设备至关重要.
- 经轴生长允许精确控制薄膜特性.
- 氧化 (NiO) 是一种抗铁磁绝缘体,有可能用于交换偏差应用.
研究的目的:
- 为了研究Co/NiO/Fe三层在W(110) 基板上长大的磁性特性.
- 探索Fe层中旋转重定向过渡对NiO和Co层磁性行为的影响.
- 阐明界面交换合在三层结构中介导磁相互作用中的作用.
主要方法:
- 用X射线磁线性二元化 (XMLD) 和X射线磁圆性二元化 (XMCD) 来进行磁性特性研究.
- 进行了元素特定的磁性歇斯底里循环测量.
- 在W(110) 基板上的表轴生长使得可控层沉积成为可能.
主要成果:
- 铁膜的磁性异构性,由厚度驱动的旋转重定向控制,通过界面交换合转移到NiO和Co层.
- 在Fe诱导的NiO旋转重定向和Co磁化切换中进行温度驱动的旋转重定向.
- 发现Fe,Co和NiO的外部磁场驱动的重定位是严格相关的.
结论:
- 接口交换合有效地调解了Co/NiO/Fe三层之间的磁相互作用.
- 铁层中的旋转重定向过渡将磁信息传播到相邻层.
- 尽管有不同的晶体结构,但对Fe和Co子层观察到相同的磁性异构性场,突出显示了强大的界面效应.
更多相关视频
07:42Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
2.7K
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.1K
相关概念视频
Ferromagnetism
2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K
Magnetic Susceptibility and Permeability
1.1K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
1.1K
NMR Spectroscopy: Spin–Spin Coupling
1.4K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
1.4K
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
863
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
863
Atomic Nuclei: Nuclear Relaxation Processes
655
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.
655
Diamagnetism
2.4K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.4K
