Giant effect of uniaxial pressure on magnetic domain populations in multiferroic bismuth ferrite |
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Authors: | Ramazanoglu M Ratcliff W Yi H T Sirenko A A Cheong S-W Kiryukhin V |
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Affiliation: | Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA. |
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Abstract: | Neutron diffraction is used to show that small (~7 MPa, or 70 bar) uniaxial pressure produces significant changes in the populations of magnetic domains in a single crystal of 2% Nd-doped bismuth ferrite. The magnetic easy plane of the domains converted by the pressure is rotated 60° relative to its original position. These results demonstrate extreme sensitivity of the magnetic properties of multiferroic bismuth ferrite to tiny (less than 10(-4)) elastic strain, as well as weakness of the forces pinning the domain walls between the cycloidal magnetic domains in this material. |
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