Deep melting reveals liquid structural memory and anomalous ferromagnetism in bismuth
- Yanshan Univ., Qinhuangdao (China). State Key Lab. of Metastable Materials Science and Technology
- Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
- Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., High Pressure Collaborative Access Team (HPCAT)
As an archetypal semimetal with complex and anisotropic Fermi surface and unusual electric properties (e.g., high electrical resistance, large magnetoresistance, and giant Hall effect), bismuth (Bi) has played a critical role in metal physics. In general, Bi displays diamagnetism with a high volumetric susceptibility (~10-4). Here in this paper, we report unusual ferromagnetism in bulk Bi samples recovered from a molten state at pressures of 1.4–2.5 GPa and temperatures above ~1,250 K. The ferromagnetism is associated with a surprising structural memory effect in the molten state. On heating, low-temperature Bi liquid (L) transforms to a more randomly disordered high-temperature liquid (L') around 1,250 K. By cooling from above 1,250 K, certain structural characteristics of liquid L' are preserved in L. Bi clusters with characteristics of the liquid L' motifs are further preserved through solidification into the Bi-II phase across the pressure-independent melting curve, which may be responsible for the observed ferromagnetism.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Natural Science Foundations of China (NNSFC)
- Grant/Contract Number:
- FG02-99ER45775; NA0001974; AC02-06CH11357; EAR-1214376; 51421091; 51332005; 51025103; 2011CB808205; 1361276; 1620548
- OSTI ID:
- 1352255
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Vol. 114, Issue 13; ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Web of Science
Femtosecond diffraction studies of solid and liquid phase changes in shock-compressed bismuth
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journal | November 2018 |
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