摘要
研究了磁场冷却前后Ni50Mn37In13磁驱动形状记忆合金薄膜在低温下的磁学行为。结果表明:磁场冷却后的Ni50Mn37In13薄膜在10 K温度下表现出一定的交换偏置效应。在特征温度Tf以下,零场冷却状态下的Ni50Mn37In13合金处于超自旋玻璃态,而经磁场冷却后发生了从自旋玻璃态向磁有序的超铁磁结构的变化。超铁磁结构中的超铁磁团簇与反铁磁基体构成了铁磁/反铁磁耦合,从而导致了交换偏置的产生。
The magnetic behaviors of the magnetic-field cooled NisoMn37In13 film at low temperature was investigated. The results show that below the characteristic temperature Tf, the alloy presents a super spin glass (SSG) state when cooled in the absence of a magnetic field; however, it will transform to the super ferromagnetic (SFM) structure after magnetic field cooling. The SFM clusters in the SFM structure are coupled with the antiferromagnetic matrix, resulting in the exchange bias.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第1期130-134,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51175212)
江苏省自然科学基金(BK2012668)