准一维Cr基材料的磁不稳定性
Magnetic instabilities in quasi-one-dimensional Cr-based material
摘要:
在5 ~ 300 K温度范围内,用直流磁化强度测量方法研究了K2 Cr 3As 3样品的磁响应与磁场(H)的关系。观察磁滞回线m(H),在高于60 K的温度下推断样品的抗磁性行为,而在较低温度下样品显示出与亚铁磁性的存在相容的磁滞回线。此外,在-1000 Oe < H < 1000 Oe的范围内的某些磁场中观察到几个尖峰状磁化跳跃,无论是正的还是负的,与所考虑的温度无关。研究了不同温度下磁化跳变的场位置,其分布可用洛伦兹曲线描述。
英文摘要:
The magnetic response of a K2Cr3As3 sample has been studied by means of dc magnetization measurements as a function of magnetic field (H) at different temperatures ranging from 5 K up to 300 K. Looking at the magnetic hysteresis loops m(H), a diamagnetic behavior of the sample has been inferred at temperatures higher than 60 K, whereas at lower temperatures the sample shows a hysteresis loop compatible with the presence of ferrimagnetism. Moreover, several spike-like magnetization jumps, both positive and negative, have been observed at certain fields in the range -1000 Oe < H < 1000 Oe, regardless of the temperature considered. The field position of the magnetization jumps has been studied at different temperatures, and their distribution can be described by a Lorentzian curve.
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