title: Low-Temperature Cationic Rearrangement in a Bulk Metal Oxide.
abstract: Cationic rearrangement is a compelling strategy for producing desirable physical properties by atomic-scale manipulation. However, activating ionic diffusion typically requires high temperature, and in some cases also high pressure in bulk oxide materials. Herein, we present the cationic rearrangement in bulk Mn2 FeMoO6 at unparalleled low temperatures of 150-300 (o) C. The irreversible ionic motion at ambient pressure, as evidenced by real-time powder synchrotron X-ray and neutron diffraction, and second harmonic generation, leads to a transition from a Ni3 TeO6 -type to an ordered-ilmenite structure, and dramatic changes of the electrical and magnetic properties. This work demonstrates a remarkable cationic rearrangement, with corresponding large changes in the physical properties in a bulk oxide at unprecedented low temperatures.
authors.affiliation: Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA.
authors.forename: Man-Rong
authors.initials: MR
authors.lastname: Li
authors.affiliation: Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA.
authors.forename: Maria
authors.initials: M
authors.lastname: Retuerto
authors.affiliation: Department of Physics & Astronomy, State University of New York, Stony Brook, NY, 11794, USA.
authors.forename: Peter W
authors.initials: PW
authors.lastname: Stephens
authors.affiliation: Department of Physics & Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ, 08854, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Croft
authors.affiliation: Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.
authors.forename: Denis
authors.initials: D
authors.lastname: Sheptyakov
authors.affiliation: Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232, Villigen PSI, Switzerland.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Pomjakushin
authors.affiliation: Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Deng
authors.affiliation: Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Akamatsu
authors.affiliation: Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, 16802, USA.
authors.forename: Venkatraman
authors.initials: V
authors.lastname: Gopalan
authors.affiliation: Departmentto de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Sánchez-Benítez
authors.affiliation: Department of Physics, Applied Physics and Astronomy, Binghamton University, P.O. Box 6000, Binghamton, NY, 13902, USA.
authors.forename: Felix O
authors.initials: FO
authors.lastname: Saouma
authors.affiliation: Department of Physics, Applied Physics and Astronomy, Binghamton University, P.O. Box 6000, Binghamton, NY, 13902, USA.
authors.forename: Joon I
authors.initials: JI
authors.lastname: Jang
authors.affiliation: Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY, 10964, USA.
authors.forename: David
authors.initials: D
authors.lastname: Walker
authors.affiliation: Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA. martha@rutchem.rutgers.edu.
authors.forename: Martha
authors.initials: M
authors.lastname: Greenblatt
keywords: Mn2FeMoO6; bulk oxides; cationic rearrangements; ferrimagnetic semiconductors; physical property tunneling