Magnetic properties of Sohncke-type Pb(TiO)Cu4(PO4)4
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913196977160192 |
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| author | Lovesey, S. W. |
| author_facet | Lovesey, S. W. |
| contents | The enantiomorphous (chiral) crystal class of the Sohncke-type insulator Pb(TiO)Cu4(PO4)4 permits the rotation of the plane of polarization of light (optical activity). Copper ions participate in antiferromagnetic order below a temperature 7 K, with magnetoelectric and piezomagnetic effects permitted. Lattice and magnetic symmetries of Pb(TiO)Cu4(PO4)4 are fully incorporated in calculated resonant x-ray Bragg diffraction patterns that are successfully compared with existing limited measurements on paramagnetic and magnetically ordered Pb(TiO)Cu4(PO4)4 [Misawa et al. Phys. Rev. B 103, 174409 (2021)]. Specifically, there is additional intensity in the ordered phase to a Bragg spot (a chiral signature) from circular polarization in the primary beam of x-rays. It is created by Cu axial magnetic dipoles, with the prospect of future experiments revealing interference between magnetic dipoles and charge-like (time-even, Templeton-Templeton) quadrupoles. Polar and magnetic (parity- and time-odd) Dirac quadrupoles and octupoles are potentially strong sources of diffraction when the reflection vector is parallel to the unique direction in the tetragonal lattice. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_07637 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic properties of Sohncke-type Pb(TiO)Cu4(PO4)4 Lovesey, S. W. Strongly Correlated Electrons The enantiomorphous (chiral) crystal class of the Sohncke-type insulator Pb(TiO)Cu4(PO4)4 permits the rotation of the plane of polarization of light (optical activity). Copper ions participate in antiferromagnetic order below a temperature 7 K, with magnetoelectric and piezomagnetic effects permitted. Lattice and magnetic symmetries of Pb(TiO)Cu4(PO4)4 are fully incorporated in calculated resonant x-ray Bragg diffraction patterns that are successfully compared with existing limited measurements on paramagnetic and magnetically ordered Pb(TiO)Cu4(PO4)4 [Misawa et al. Phys. Rev. B 103, 174409 (2021)]. Specifically, there is additional intensity in the ordered phase to a Bragg spot (a chiral signature) from circular polarization in the primary beam of x-rays. It is created by Cu axial magnetic dipoles, with the prospect of future experiments revealing interference between magnetic dipoles and charge-like (time-even, Templeton-Templeton) quadrupoles. Polar and magnetic (parity- and time-odd) Dirac quadrupoles and octupoles are potentially strong sources of diffraction when the reflection vector is parallel to the unique direction in the tetragonal lattice. |
| title | Magnetic properties of Sohncke-type Pb(TiO)Cu4(PO4)4 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2401.07637 |