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Anisotropic properties, charge ordering, and ferrimagnetic structures in the strongly correlated β−V2PO5 single crystal
- Source :
- Physical Review Materials. 4
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- Single crystal $\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{V}}_{2}{\mathrm{PO}}_{5}$ was synthesized by chemical vapor transport method and characterized by transport, thermodynamic, neutron diffraction, nuclear magnetic resonance measurements and first-principles calculation. It was shown to be a semiconductor with a band gap of 0.48 eV, undergoing a charge ordering (unusual ${\mathrm{V}}^{2+}$ and ${\mathrm{V}}^{3+}$) phase transition accompanied by a tetragonal to monoclinic structural distortion at 610 K and a paramagnetic to ferrimagnetic phase transition at 128 K with a propagation vector of $\mathbf{k}=0$. The easy axis is in the monoclinic $ac$ plane pointing 47(9)${}^{\ensuremath{\circ}}$ away from the monoclinic $a$ axis. This collinear ferrimagnetic structure and anisotropic isothermal magnetization measurements suggest weak magnetic anisotropy in this compound. The first-principles calculations indicate that the intrachain interactions in the face-sharing ${\mathrm{VO}}_{6}$ chains dominate the magnetic hamiltonian and identify the ${\mathrm{\ensuremath{\Gamma}}}_{5}^{+}$ normal mode of the lattice vibration to be responsible for the charge ordering and thus the structural phase transition.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
Condensed matter physics
Neutron diffraction
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Condensed Matter::Materials Science
Paramagnetism
Magnetic anisotropy
Tetragonal crystal system
Charge ordering
Ferrimagnetism
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
General Materials Science
010306 general physics
0210 nano-technology
Single crystal
Monoclinic crystal system
Subjects
Details
- ISSN :
- 24759953
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Physical Review Materials
- Accession number :
- edsair.doi...........073d3e2889d5c734d00f39f5309cc954