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Title: Robust long-range magnetic correlation across antiphase domain boundaries in Sr2CrReO6

Journal Article · · Physical Review B
ORCiD logo [1];  [1];  [1];  [2];  [3]; ORCiD logo [4];  [5];  [1]
  1. Univ. of Toronto, ON (Canada)
  2. Beihang Univ., Beijing (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Univ. of Alabama, Tuscaloosa, AL (United States)
  5. The Ohio State Univ., Columbus, OH (United States)

Here, we report a resonant elastic x-ray scattering study of a thin-film sample of Sr2CrReO6, which has one of the highest ferrimagnetic transition temperatures among ordered double perovskites.We found resonantly enhanced magnetic Bragg peaks at Q = (odd, odd, odd) at both the rhenium L2 and L3 edges, which coincide with the structural Bragg peaks of Sr2CrReO6. By analyzing the widths of these Bragg peaks, we extracted very different structural and magnetic correlation lengths. The former is about 15 nm, while the latter is constrained by the instrumental resolution to be at least 90 nm. We argue that a finite structural correlation length is consistent with the existence of antiphase nanodomains in our sample. On the other hand, a much larger magnetic correlation length indicates that the magnetic correlation extends far beyond the boundaries of individual domains and is consistent with strong antiferromagnetic coupling between different antiphase domains. Last, from the azimuthal dependence of the magnetic intensity, we show that the magnetic moments lie perpendicular to the c axis, which explains the earlier bulk magnetization data.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation (CFI); Ontario Research Fund (ORF); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; DMR-2011876
OSTI ID:
1771137
Report Number(s):
BNL-221144-2021-JAAM; TRN: US2206889
Journal Information:
Physical Review B, Vol. 103, Issue 6; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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