9 research outputs found
Analysis of PHMR Characteristics Dependence on Drive Current and Measurement Direction with Multi-Electrode System
No full text본 연구는 N iFe/IrM n 이중층 구조의 평면 홀 자기저항 센서에서 전류 인가 방향과 전압 측정 방향에 의한 오프셋 전압과 특성 곡선의 위상 변화에 대해 조사했다. 해석적인 방법을 통해 센서 신호를 분리하여 자기 저항과 무관한 오프셋 전압, 자기 저항의 위상 변화에 의한 오프셋 전압을 구분하고, 위상 변화에 의한 A M R 신호와 PHM R 신호의 비율과 자기 센서의 민감도 변화를 분석했다. 전류 인가 방향과 전압 측정 방향이 특정한 조건에서 출력전압을 증가시키고, 높은 민감도를 나타냈다. 이러한 결과는 센서 설계 및 제작 과정의 최적화와 센서 성능 개선에 기여할 것으로 기대된다.
This study investigated the offset voltage and phase shift of characteristic curves caused by current injection direction and voltage measurement direction in a planar Hall magnetoresistance sensor with a NiFe/IrMn bilayer structure. Using analytical methods, we separated the sensor signals to distinguish the offset voltage unrelated to the magnetic field and the offset voltage caused by the phase shift of magnetoresistance. We then analyzed the ratio of AMR signals and PHMR signals caused by phase shifts and changes in the sensitivity of the magnetic sensor. Under certain conditions, the current injection direction and voltage measurement direction increased the output voltage and exhibited high sensitivity. These results are expected to contribute to optimizing sensor design and fabrication processes and improving sensor performance.FALS
Analysis of Output Characteristics of Planar Hall Magnetoresistance Sensors with Porous Pattern
No full text본 연구는 다공성 구조를 가진 평면 홀 자기저항(PHMR) 센서의 패턴에 따른 출력 특성을 분석하였다. 다공성 패턴의 영향을평가하기 위해 N iFe/IrM n 이중층 구조의 PHMR 센서에 직교 배열과 대각선 배열의 다공성 패턴 구조를 구현하고, 전류 밀도 분포 및 센서의 출력 신호를 분석하였다. 또한, 전류 분포의 왜곡을 최소화하기 위해 다이아몬드 형태의 다공성 패턴을 적용하여휘스톤브릿지 배열의 다공성 구조에서 선폭과 길이의 비율이 센서 출력 신호에 미치는 영향을 규명하였다. 다공성 패턴 기반PHMR 센서는 비다공성 센서에 비해서 높은 출력 신호를 나타내었으며, 이는 다공성 기판을 활용한 센서 설계 및 성능 향상에중요한 기초 데이터를 제공할 것으로 기대된다.
In this study, we analyze the output characteristics of a planar Hall magnetoresistance sensor (PHMR) based on porous pattern. To evaluate the impact of the porous pattern in a NiFe/IrMn bilayer PHMR sensor, orthogonal and diagonal porous pattern were implemented, and the current density distribution and output signal of sensor were analyzed. Additionally, to minimize the distortion of current distribution, a diamond-shaped porous pattern was utilized, and the effect of the aspect ratio in the Wheatstone bridge array of the porous pattern on the sensor’s output signal was investigated. The results showed that the porous pattern-based PHMR sensor exhibited a high output signal, providing basic data for the design and performance enhancement of sensors based on porous substrates.FALSEkc
Recent Advances and Applications in Planar Hall Magnetoresistive Sensors
No full textRecent advances in nano/micro technology have resulted in the widespread adoption of magnetoresistive sensors in storage media and other applications. Magnetoresistive sensors have high performance that satisfies the demands of advanced applications that require smart sensing performance, such as the Internet of Things, mobile devices, space and aviation, as well as the smart home, environment, and health care application. In this discussion, I will talk about magnetoresistive sensors based on the planar Hall effect exhibit high sensitivity, low noise characteristics, and wide temperature range suitability for ultra-low magnetic field detection. Additionally, their simple structure makes them cost-effective, easy to fit and miniaturize, and easy to integrate, rendering them a promising sensor for various new applications
Low-Frequency Noise and Detectivity Analysis of Planar Hall Magnetoresistance Sensors for Applications
No full textWe studied noise and detection performance of planar Hall magnetoresistance (PHMR) sensors, specifically cross-junction and multi-ring sensors. The sensors were characterized in 0.5 Hz-200 Hz, and their ability to detect magnetic field in an unshielded environment was evaluated. The external magnetic field was applied parallel and perpendicular to the easy axial direction, and the resulting spectrum was measured. By optimizing the sensor structure, the resolution was enhanced at low frequencies, indicating good detection values. The results demonstrate that PHMR sensors are universal, high-performance magnetometers that can applies to a variety of applications. Moreover, the field resolution of the PHMR sensor can open new opportunities for biomagnetic signal detection, and the sensor can have industrial applications in harsh environments
Establishment of customized drug efficacy assessment platform based on the comparative analysis of primate degenerative brain disease models
No full text영장류 퇴행성 뇌질환 모델의 비교의학적 분석 데이터 기반 맞춤 약물 유효성 평가 플랫폼 구축KGM456201
