Leitao Diana C, Silva Ana V, Paz Elvira, Ferreira Ricardo, Cardoso Susana, Freitas Paulo P
INESC-MN and IN, Rua Alves Redol 9, 1000-029 Lisboa, Portugal. Instituto Superior Tecnico (IST), Universidade de Lisboa, Av. Rovisco Pais, 1000-029 Lisboa, Portugal.
Nanotechnology. 2016 Jan 29;27(4):045501. doi: 10.1088/0957-4484/27/4/045501. Epub 2015 Dec 11.
The ability to detect the magnetic fields that surround us has promoted vast technological advances in sensing techniques. Among those, magnetoresistive sensors display an unpaired spatial resolution. Here, we successfully control the linear range of nanometric sensors using an interfacial exchange bias sensing layer coupling. An effective matching of material properties and sensor geometry improves the nanosensor performance, with top sensitivities of 3.7% mT(-1). The experimental results are well supported by 3D micromagnetic and magneto-transport simulations.
检测我们周围磁场的能力推动了传感技术的巨大技术进步。其中，磁阻传感器具有无与伦比的空间分辨率。在这里，我们通过界面交换偏置传感层耦合成功地控制了纳米传感器的线性范围。材料特性与传感器几何形状的有效匹配提高了纳米传感器的性能，最高灵敏度达到3.7% mT⁻¹。三维微磁和磁输运模拟很好地支持了实验结果。
