TY - JOUR
T1 - Robust spin glass state with exceptional thermal stability in a chemically complex alloy
AU - Yu, Jihao
AU - Wu, Weiwei
AU - Zhang, Huaping
AU - Shao, Ruiwen
AU - Zhang, Fan
AU - Wang, Hong
AU - Li, Zian
AU - Luan, Junhua
AU - Jiao, Zengbao
AU - Liu, Chain Tsuan
AU - Sun, Baoan
AU - Bai, Haiyang
AU - Wang, Weihua
N1 - Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/9
Y1 - 2022/9
N2 - Spin glasses (SGs) arise from the frustration of competing magnetic interactions without long-range order; hence they tend to be destabilized by thermal fluctuation and exhibit a rather low glass transition temperature, presenting a major challenge for SG research and applications. Here, we report an unusual SG state in quaternary Fe-Co-Ni-Mn chemically complex alloys (CCAs). The SG exhibits an ultrahigh freezing temperature above room temperature, well exceeding that of conventional bulk SGs, as well as a unique and fast relaxation dynamics. The thermally stable SG state can be attributed to the strong frustration of exchange interactions owing to the high concentration of magnetic atoms and their chemical randomness in the solid-solution lattice. In addition, owing to the high phase stability of CCAs, the SG is robust over a wide compositional range, enabling a variety of magnetic phase transitions and largely tunable glass properties. These properties make CCAs important for understanding the nature of the SG state and intriguing for practical applications of SGs in spintronics.
AB - Spin glasses (SGs) arise from the frustration of competing magnetic interactions without long-range order; hence they tend to be destabilized by thermal fluctuation and exhibit a rather low glass transition temperature, presenting a major challenge for SG research and applications. Here, we report an unusual SG state in quaternary Fe-Co-Ni-Mn chemically complex alloys (CCAs). The SG exhibits an ultrahigh freezing temperature above room temperature, well exceeding that of conventional bulk SGs, as well as a unique and fast relaxation dynamics. The thermally stable SG state can be attributed to the strong frustration of exchange interactions owing to the high concentration of magnetic atoms and their chemical randomness in the solid-solution lattice. In addition, owing to the high phase stability of CCAs, the SG is robust over a wide compositional range, enabling a variety of magnetic phase transitions and largely tunable glass properties. These properties make CCAs important for understanding the nature of the SG state and intriguing for practical applications of SGs in spintronics.
UR - http://www.scopus.com/inward/record.url?scp=85139020154&partnerID=8YFLogxK
U2 - 10.1103/PhysRevMaterials.6.L091401
DO - 10.1103/PhysRevMaterials.6.L091401
M3 - Article
AN - SCOPUS:85139020154
SN - 2475-9953
VL - 6
JO - Physical Review Materials
JF - Physical Review Materials
IS - 9
M1 - L091401
ER -