Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3027063
Keywords
doping; ferromagnetic materials; lanthanum compounds; magnetic moments; magnetic thin films; magnetomechanical effects; pulsed laser deposition; spin glasses; strontium compounds; X-ray absorption
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Funding
- U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- UCR [H94003-08-2-0803]
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We present an element-resolved study of the valence and magnetic properties of LaCoO3 thin films grown via pulsed laser deposition. The Co L edge x-ray absorption shows that ferromagnetic (FM) order arises from a slight hole doping of the system presumably due to nonstoichiometry, which in the bulk system disrupts the low-spin state. However, even though the films are hole doped, the magnetic moments under tensile strain are much larger than the bulk system indicating that the strain can greatly increase the FM fraction observed in the spin-glass regime at low doping.
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