The exchange bias after zero-field cooling based on the spin glass state has the potential for widespread technical practicality. However, it is limited by the lower frozen temperature (< 150 K) of traditional spin glass, which hinders its practical application. In this work, the nano-ferromagnetic characteristic was observed above the curie temperature in the NiMnSb polycrystalline alloy, induced by local lattice distortion. The glassy magnetic state character has existed in the temperature range of 328 K ∼ 385 K, confirmed by magnetic relaxation with different waiting times and AC susceptibility. An exchange bias effect after zero-field cooling has been observed above the curie temperature due to the exchange coupling between the nano-ferromagnetic clusters and spin glass. This work broadens the scope of research into spin glasses at high temperatures and provides new ideas for designing and obtaining exchange bias effects after zero-field cooling.

中文翻译：

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Ni2MnSb 多晶 Heusler 合金中居里温度以上观察到的自旋玻璃和零场冷却交换偏置效应

基于自旋玻璃态的零场冷却后的交换偏压具有广泛的技术实用性的潜力。但受限于传统旋转玻璃较低的冷冻温度（<150 K），阻碍了其实际应用。在这项工作中，在 NiMnSb 多晶合金的居里温度以上观察到由局部晶格畸变引起的纳米铁磁特性。通过不同等待时间的磁弛豫和交流磁化率证实了玻璃态磁态特征在328 K ∼ 385 K的温度范围内存在。由于纳米铁磁簇和自旋玻璃之间的交换耦合，在高于居里温度时观察到零场冷却后的交换偏置效应。这项工作拓宽了高温自旋玻璃的研究范围，并为零场冷却后设计和获得交换偏压效应提供了新思路。