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Magnetoresistance

From Advanced MicroSensors, Inc.
 

 
Materials that change their resistance in the presence of magnetic fields have been used as read elements in recording heads for a long time. Three different technologies have evolved in the last 20 years: 1. Anisotropic Magneto Resistance (AMR) materials exhibit a resistance change of up to 2% in magnetic fields. NiFe is the alloy of choice in practically all AMR applications. AMR films are still used extensively in magnetic field sensors; their characteristic response to a magnetic field is shown in Fig.1 below. AMR sensors need to be biased correctly to achieve a linear response. The characteristic response of a Soft Adjacent Layer (SAL) - biased MR sensor to a magnetic field is shown in Fig. 1 below. The typical structure of such a sensor is shown in Fig 2 a.
Product Announcements
iC-Haus Corporation - iC-SM2L Linear AMR Sensor for 2 mm pitch
The iC-SM2L is a linear position Sensor which operates on the AMR (anisotropic magneto resistance) and has been designed to work with magnetic scales which have a N/S pole pitch of 2 mm... (read more)
iC-Haus Corporation - iC-SM5L Linear AMR Sensor for 5mm pitch
The iC-SM5L is a linear position Sensor which operates on the AMR (anisotropic magneto resistance) and has been designed to work with magnetic scales which have a N/S pole pitch of 5 mm. (read more)
Honeywell - HMC1041Z 1-Axis Magnetic Sensor
Narrow dimensions and small size make it ideal for low-profile vertical sensing applications Honeywell's newest addition to its magnetic sensor product line is a z-axis, surface mount sensor designed... (read more)
Honeywell Sensing and Control - VF526DT Dual Hall-Effect Digital Position Sensors
Honeywell's VF526DT Dual Hall-Effect Digital Position Sensors provide signal stability over a wide temperature range, featuring both speed and direction sensing in a 4-pin SOT-89B package available in... (read more)
Topics of Interest
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