A system for providing a magnetic field for a sample includes a first contact surface for thermally contacting the sample and a second contact surface, which is in thermal contact with at least one magnetic element.

A magnetic field sensor is provided, including a substrate, a first bridge circuit formed on the substrate, the first bridge circuit being arranged to generate a first signal indicative of a motion of a target, and a second bridge circuit formed on the substrate, the second bridge circuit being arranged to generate a second signal indicative of whether the magnetic field sensor is aligned with the target.

A magnetic sensing device includes a non-magnetic layer serving as a spacer and two magnetic layers that sandwich the spacer, and two oxide layers that sandwich the trilayer structure including the two magnetic layers and the spacer.

Methods, apparatuses, and systems for detecting a stray magnetic field are provided. An example apparatus may include a first magnetic sensor element at a first position relative to a magnetic field source to detect a target magnetic field emitted by the magnetic field source, a second magnetic sensor element at a second position relative to the magnetic field source to detect the target magnetic field emitted by the magnetic field source, and a processor element electronically coupled to the first magnetic sensor element and the second magnetic sensor element. In some examples, the processor element may be configured to: receive a first output from the first magnetic sensor element, receive a second output from the second magnetic sensor element, and detect the stray magnetic field interfering with the target magnetic field based at least in part on the first output and the second output.

A magnetic field sensor includes a substrate, a first channel comprising a first magnetic field sensing element supported by the substrate and configured to generate a first magnetic field signal indicative of a first magnetic field experienced by the first magnetic field sensing element, a second channel comprising a second magnetic field sensing element supported by the substrate and configured to generate a second magnetic field signal indicative of a second magnetic field experienced by the second magnetic field sensing element, and at least one shield configured to reduce a bandwidth of the first magnetic field by a first amount and to reduce a bandwidth of the second magnetic field by a second amount. The shield is able to act as a magnetic anti-aliasing filter for the magnetic field sensing elements, which can then be chopped or sampled.

A method for setting a gain of a magnetic field sensor includes providing the magnetic field sensor and an evaluation unit on a same printed circuit board, generating a magnetic field signal with the magnetic field sensor, transmitting the magnetic field signal to the evaluation unit, evaluating the magnetic field signal with the evaluation unit, and transmitting a signal for setting the gain from the evaluation unit to the magnetic field sensor. In an example embodiment, the magnetic field sensor is a rotor position sensor of an electric motor.

A magnetic field monitor includes a magnetic field sensor that generates an electronic signal at a time period representing a magnetic field of the environment and includes a sensor transducer having a sensor bobbin, a primary coil, a secondary, over-winding coil, a sensor circuit, a controller connected to the primary coil, and a digitally controlled potentiometer connected to the secondary coil and controller. A non-linear output is converted to a quantitative linear output.

The present disclosure provides a wireless flexible magnetic sensor based on magnetothermal effect, and a preparation method and a detection method thereof. The magnetic sensor includes an aerogel substrate, and magnetic nanoparticles having magnetothermal effect that are attached to a surface of the aerogel substrate. The magnetic sensor is placed in the alternating magnetic field to be measured, and then a trigger signal is generated by a data collecting device and sent to an infrared camera. The infrared camera can collect temperature distribution information at different instants of time from the surface of the magnetic sensor. A curve of temperature rise changes at different positions on the surface of the magnetic sensor can be obtained by analyzing a temperature distribution image captured by the infrared camera. Thus, a spatial distribution of the strength of the alternating magnetic field at different positions on the surface of the sensor can be determined.

A method is provided comprising: obtaining a temperature reading by using a temperature sensing element that is part of a magnetic field sensor; obtaining a stress reading by using a stress sensing element that is part of the magnetic field sensor; calculating a stress difference using the temperature reading and the stress reading, the stress difference including a difference between an expected stress associated with the temperature reading and the stress reading obtained from the stress sensing element; and adjusting a gain of a sensing element signal based on the stress difference, the sensing element signal being generated at least in part by a magnetic field sensing element that is part of the magnetic field sensor.

Described herein is an apparatus for quality control of a superconducting tape including (a) at least two rolls contacting the superconducting tape and being suitable for injecting an electric current into the superconducting tape; (b) at least two measuring contacts contacting the superconducting tape and being suitable for measuring an electric voltage along the superconducting tape; and (c) a cooling section suitable for cooling the superconducting tape below its critical temperature, where the at least two rolls and the at least two measuring contacts are located inside the cooling section, and where the cooling section is suitable for keeping the rolls at a first temperature and the measuring contacts at a second temperature, where the first temperature is lower than the second temperature.