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Substitutional tuning of electronic phase separation in CaFe3O5

DOI: 10.1103/PhysRevMaterials.5.024406 DOI Help

Authors: Ka H. Hong (University of Edinburgh) , Elena Solana-Madruga (University of Edinburgh) , Branislav Viliam Hakala (University of Edinburgh) , Midori Amano Patino (Kyoto University) , Pascal Manuel (ISIS Facility) , Yuichi Shimakawa (Kyoto University) , J. Paul Attfield (University of Edinburgh)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Materials , VOL 5

State: Published (Approved)
Published: February 2021

Abstract: Electronic phase separation into charge-ordered (CO) and charge-averaged (CA) phases in Ca Fe 3 − x M x O 5 samples for dopants M = Mn and Co has been investigated using powder neutron and x-ray diffraction, magnetization, and Mössbauer spectroscopy measurements. Electronic phase separation is observed in lightly doped Ca Fe 3 O 5 samples, where 4 – 10 % Ca is replaced by Mn, Fe, or Co, and the CA ground state is stabilized at higher doping levels. The CO and CA phases are found to emerge below a common magnetic ordering temperature at 300 – 320 K providing strong evidence for a lattice strain-driven mechanism that couples their magnetic transitions.

Journal Keywords: Magnetic phase transitions; Phase separation; Complex oxides; Transition-metal oxides

Subject Areas: Materials, Physics

Instruments: I11-High Resolution Powder Diffraction

Other Facilities: WISH beamline at ISIS

Added On: 22/02/2021 13:51

Discipline Tags:

Materials Science Quantum Materials Physics Hard condensed matter - electronic properties

Technical Tags:

Diffraction X-ray Powder Diffraction