Realization of the axial next-nearest-neighbor Ising model in
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
In this paper, we report small-angle neutron scattering (SANS) measurements and theoretical modeling of . Analysis of the SANS data reveals a phase transition to sinusoidally modulated magnetic order at TN = 63 K to be second order and a first-order phase transition to ferromagnetic order at Tc = 48 K. Within the sinusoidally modulated magnetic phase (Tc < T < TN), we uncover a dramatic change, by a factor of 3, in the ordering wave vector as a function of temperature. Finally, these observations all indicate that is a close realization of the three-dimensional axial next-nearest-neighbor Ising model, a prototypical framework for describing commensurate to incommensurate phase transitions in frustrated magnets.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); LANL Laboratory Directed Research and Development (LDRD) Program; Dept. of Commerce (United States); National Science Foundation (NSF)
- Grant/Contract Number:
- AC52-06NA25396; DMR-1508249; AC05-00OR22725; AC02-06CH11357
- OSTI ID:
- 1409774
- Alternate ID(s):
- OSTI ID: 1408169; OSTI ID: 1410942; OSTI ID: 1481410
- Report Number(s):
- LA-UR-17-24069
- Journal Information:
- Physical Review B, Vol. 96, Issue 17; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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