Abstract
Abstract—A big problem in magnetic and, in particular, magnetocaloric studies is the accurate measurement of the temperature of materials, especially in high pulsed and alternating magnetic fields. The disadvantages of the used contact temperature sensors (microthermocouples and film thermistors) are: (1) the influence of electromagnetic interference on their readings, proportional to the time derivative of the magnetic field, (2) their relatively long response time due to thermal inertia, (3) the impossibility of accurate measurement temperatures of thin and microstructured samples. The described difficulties can be avoided by using contactless optical methods for measuring the temperature of magnetic materials in high magnetic fields. This review describes advanced non-contact optical methods for measuring the magnetocaloric effect using known materials as an example, and provides a comparative analysis of the main characteristics of these methods, such as: maximum magnetic field, sampling frequency, time constant and spectral range of the detector, error and temperature resolution.
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