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Enhanced magnetoelectric effect in M-type hexaferrites by Co substitution into trigonal bi-pyramidal sites

DOI: 10.1063/1.5017683 DOI Help

Authors: J. E. Beevers (The University of York) , C. J. Love (University of York; Diamond Light Source) , V. K. Lazarov (The University of York) , S. A. Cavill (University of York; Diamond Light Source) , H. Izadkhah (Northeastern University) , C. Vittoria (Northeastern University) , R. Fan (Diamond Light Source) , G. Van Der Laan (Diamond Light Source) , S. S. Dhesi (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 112

State: Published (Approved)
Published: February 2018
Diamond Proposal Number(s): 10361 , 12565 , 14135

Abstract: The magnetoelectric effect in M-type Ti-Co doped strontium hexaferrite has been studied using a combination of magnetometry and element specific soft X-ray spectroscopies. A large increase (>×30) in the magnetoelectric coefficient is found when Co2+ enters the trigonal bi-pyramidal site. The 5-fold trigonal bi-pyramidal site has been shown to provide an unusual mechanism for electric polarization based on the displacement of magnetic transition metal (TM) ions. For Co entering this site, an off-centre displacement of the cation may induce a large local electric dipole as well as providing an increased magnetostriction enhancing the magnetoelectric effect.

Journal Keywords: Magnetism; Electromagnetics; Electrostatics; Electric; Transition

Subject Areas: Physics, Materials

Instruments: I06-Nanoscience

Added On: 21/02/2018 08:54

Discipline Tags:

Materials Science Quantum Materials Multiferroics Physics Hard condensed matter - electronic properties Magnetism

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Absorption Spectroscopy (XAS) X-ray Magnetic Circular Dichroism (XMCD)