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| Hauptseite > Publikationsdatenbank > Noncollinear magnetic structure and anisotropic magnetoelastic coupling in cobalt pyrovanadate Co 2 V 2 O 7g4 > print |
| Hauptseite > Publikationsdatenbank > Noncollinear magnetic structure and anisotropic magnetoelastic coupling in cobalt pyrovanadate Co 2 V 2 O 7g4 > print |
| 001 | 866007 | ||
| 005 | 20250129094349.0 | ||
| 024 | 7 | _ | |a 10.1103/PhysRevB.100.134420 |2 doi |
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| 024 | 7 | _ | |a 2469-9950 |2 ISSN |
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| 100 | 1 | _ | |a Ji, W. H. |0 P:(DE-Juel1)167574 |b 0 |
| 245 | _ | _ | |a Noncollinear magnetic structure and anisotropic magnetoelastic coupling in cobalt pyrovanadate Co 2 V 2 O 7g4 |
| 260 | _ | _ | |a Woodbury, NY |c 2019 |b Inst. |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Co2V2O7 was recently reported to exhibit remarkable magnetic-field-induced magnetization plateaus and ferroelectricity [R. Chen et al., Phys. Rev. B 98, 184404 (2018)], but its magnetic ground state remains ambiguous. Magnetometry measurements and time-of-flight neutron powder diffraction (NPD) have been employed to study the structural and magnetic properties of Co2V2O7, which includes two nonequivalent Co sites. Upon cooling below the Néel temperature TN=6.0(2) K, we observe magnetic Bragg peaks at 2 K in NPD, which indicates the formation of long-range magnetic order of Co2+ moments. After symmetry analysis and magnetic structure refinement, we demonstrate that Co2V2O7 possesses a complicated noncollinear magnetic ground state with Co moments mainly located in the b-c plane and forming a noncollinear spin-chain-like structure along the c-axis. The ab initio calculations demonstrate that the noncollinear magnetic structure is more stable than various ferromagnetic states at low temperature. The noncollinear magnetic structure with a canted ↑↑↓↓ spin configuration is considered to be the origin of magnetoelectric coupling in Co2V2O7 because the inequivalent exchange striction induced by the spin-exchange interaction between the neighboring spins could be the driving force of ferroelectricity. It is also found that the deviation of lattice parameters a and b is opposite below TN, while the lattice parameter c and β stay almost constant below TN, evidencing the anisotropic magnetoelastic coupling in Co2V2O7. |
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| 773 | 1 | 8 | |a 10.1103/physrevb.100.134420 |b American Physical Society (APS) |d 2019-10-14 |n 13 |p 134420 |3 journal-article |2 Crossref |t Physical Review B |v 100 |y 2019 |x 2469-9950 |
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