Pressure-induced magnetic transition in manganite (La{sub 0.75}Ca{sub 0.25}MnO{sub 3}).
Journal Article
·
· Phys. Rev. Lett.
Low temperature Mn K-edge x-ray magnetic circular dichroism and x-ray diffraction measurements were carried out to investigate the stability of the ferromagnetic ground state in manganite La{sub 0.75}Ca{sub 0.25}MnO{sub 3} under nearly uniform compression using diamond anvil cells. The magnetic dichroism signal gradually decreases with pressure and disappears at 23 GPa, and meanwhile a uniaxial compression of MnO{sub 6} octahedra along the b axis is observed to continuously increase with pressure and become anomalously large at 23.5 GPa. These changes are attributed to a ferromagnetic-antiferromagnetic transition that is associated with orbital ordering at high pressure.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 956917
- Report Number(s):
- ANL/MSD/JA-62430; PRLTAO; TRN: US201007%%112
- Journal Information:
- Phys. Rev. Lett., Vol. 102, Issue 2009; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- ENGLISH
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