Abstract

Magnetic properties and high-frequency impedance of nanocrystalline Fe_73.5Si_16.5B₆Nb₃Cu₁ ribbons are studied in a high-temperature range of 300 to 723 K. The exchange-coupled state of nanocrystallites was found to be destructed at a temperature of about 530 K, which is substantially lower than the Curie temperature of the amorphous phase that is close to 635 K. It was found that, at an ac frequency of above 5 MHz, the marked magnetoimpedance effect (more than 50% for the magneoimpedance ratio in the case of complete impedance) is observed over the whole temperature range under study. This similar behavior can be essential in designing special-purpose magnetic field sensors intended for high-temperature applications.

中文翻译：

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纳米晶FeSiBNbCu带在300至723 K温度范围内的磁性能和高频阻抗

摘要

纳米晶Fe _73.5 Si _16.5 B ₆ Nb ₃ Cu _1的磁性能和高频阻抗在300至723 K的高温范围内研究了碳带。发现纳米晶体的交换耦合状态在约530 K的温度下被破坏，该温度大大低于接近于非晶态的居里温度。至635K。发现在高于5 MHz的交流频率下，在整个研究温度范围内均观察到显着的磁阻抗效应（在完全阻抗的情况下，磁阻抗比超过50％）。在设计用于高温应用的专用磁场传感器时，这种相似的行为可能至关重要。