Products: TMR Magnetic Sensors

General Description: SpinTJ Magnetic Field Sensors

The SpinTJ magnetic sensor family builds upon Micro Magnetics’ in-house expertise developing low-field magnetic tunnel junction sensor products. Based on our proprietary fabrication processes, we have developed patented recipes for fabricating macroscopic, micron-scale, and submicron MTJ (or TMR) field sensors. These sensors offer unmatched spatial resolution (active areas of less than 1 μm²), superior field sensitivity (field noise on the order of 1 nanotesla), and the ability to withstand extreme environmental conditions. SpinTJ sensors have a field sensitivity 50 times better than conventional magnetoresistive read/write heads and over 1000 times better than conventional Hall-effect sensors. In addition, their small active areas guarantee a spatial resolution far exceeding any other commercially available magnetic sensor technology.

Our SpinTJ magnetic sensors are based on ultra-thin magnetic films deposited on silicon. These sensors are available in a number of packages and electrical configurations, including a plug-and-play sensor probe and an encapsulated 8-lead DIP package. We also offer custom packages and electrical configurations. Micro Magnetics also offers a standard preamplifier for signal amplification and conditioning.

Micro Magnetics’ SpinTJ magnetic sensors are already in use in a number of cutting-edge industrial and research applications, including semiconductor fault isolation, detection of single micron-size bio-magnetic particles, and static and dynamic studies of micromagnetics and domain structure in small patterned magnetic films. See our “Applications” pages for some of ways people have been using our magnetic sensor technologies.

Introduction to Spintronics

Introduction to Nanotechnology

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Basic Features of Micro Magnetics' SpinTJ Sensors

Sensor Selection Guide 

Type	Spatial Resolution	Sensing Range	Sensitivity	Detectability	Package	Part Number	Picture
Micro Sensor	~ 2 μm	50 Oe	0.1-1.0%/Oe eqv. 1-10 mV/V/Oe	50 nT/Hz1/2 @ 100 Hz 5 nT/Hz1/2  @ 10 kHz	Bare die	STJ-001
					Short probe	STJ-010
					Long probe	STJ-020
					SMA probe	STJ-030
General Purpose Low Noise Sensor	~ 0.9 mm	30 Oe	0.3-2.0%/Oe eqv. 3-20 mV/V/Oe	2 nT/Hz1/2  @ 100 Hz 200 pT/Hz1/2 @ 10 kHz	Bare die	STJ-201
					Short probe	STJ-210
					Long probe	STJ-220
					SMA probe	STJ-230
					SOIC-8	STJ-240
					DIP-8	STJ-300
Full Bridge Sensor	~ 0.9 mm	20 Oe	1-5 mV/V/Oe	3 nT/Hz1/2  @ 10 Hz	SOIC-8	STJ-340

3-Axis Magnetic Sensors and Magnetometers

	3-Axis Magnetic Field Sensor: STJ-3D (Integrated Sensor)
	3-Axis Magnetometer Probe: SpinMag3D (Ultrasensitive and Miniaturized)
	3-Axis Magnetometer Probe: SpinMeter3D (USB Probe)

Signal Conditioning and Accessories

Signal Conditioning Electronics: AL-05 (for use with STJ sensors in probe package)

Custom Solutions

	STJ-A Series: Magnetic Field Micro Sensor Arrays
	STJ-B Series: Biomagnetic Sensing Solutions

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