在灵活的Spintronics中使用太阳能驱动的反铁磁/铁磁开关
Chenying Wang1, Yujing Du2, Yifan Zhao1,2
1State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies, School of Instrument Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
Nanomaterials (Basel, Switzerland)
|December 22, 2023
概括
研究人员使用反铁磁/铁磁异质连接开发出灵活的旋转器件. 阳光改变了合,使可穿戴应用的磁化翻转和磁电阻变化成为可能.
科学领域:
- 灵活的电子设备 灵活的电子设备
- 这就是Spintronics.
- 材料科学是一种材料科学.
背景情况:
- 灵活的电子设备对可穿戴设备和结构监控具有前景.
- 螺旋电子提供快速响应和高度集成,但在柔性基板上的热量方面面临挑战.
- 螺旋电子器件的高电流密度产生显著的焦尔热量,限制了柔性材料的小型化.
研究的目的:
- 提出一个灵活的自旋电子装置的原型,克服小型化的局限性.
- 为了研究阳光对抗铁磁/铁磁异质连接的作用.
- 为了展示可穿戴式自旋传感器的潜力.
主要方法:
- 制造具有反铁磁/铁磁异质连接的灵活旋转器件.
- 通过太阳光利用直接的光诱导电子兴奋剂来修改层间合.
- 应用一个小的磁场 (±125 Oe) 来诱导磁化翻转.
- 在光照下测量磁阻变化.
主要成果:
- 阳光浸泡有效地改变了通过光学诱导的电子兴奋剂通过光学诱导的电子兴奋剂的层间合强度.
- 几乎180°的磁化翻转是通过一个小的应用磁场实现的.
- 在轻光照明下,在灵活的自旋电子中显示出显著的磁阻变化 (15~29%).
- 成功实现了手指上的灵活的自旋传感器,表明了可穿戴的潜力.
结论:
- 开发了一种新的灵活的自旋电子设备架构.
- 展示了太阳光作为一种可行的方法来调整灵活基板上的自旋特征.
- 确定了可穿戴技术和新型光伏/自旋传感器中灵活自旋传感器的潜力.
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 Field of a Solenoid
4.0K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
Consider a solenoid with 100 turns wrapped around a cylinder of...
4.0K
Biasing of Metal-Semiconductor Junctions
259
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
259
Types Of Superconductors
983
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
983
Metal-Semiconductor Junctions
352
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
352
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


