Neutron Diffraction and Paramagnetic Scattering from a High Pressure Phase of MnGeO<sub>3</sub> (Ilmenite)

Tsuzuki, Kentaro; Ishikawa, Yoshikazu; Watanabe, Noboru; Akimoto, Syun‐iti

doi:10.1143/jpsj.37.1242

Cited by 18 publications

(4 citation statements)

References 10 publications

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“…MnTiO 3 [66], MnGeO 3 [67], MgMnO 3 [68], Yb 3 Pt 4 [ [84], GaV 4 S 8 [85], CaBaCo 2 Fe 2 O 7 [86], Tb(DCO 2 ) 3 [87], CrSe [88] case, the spin moment and g vector are coupled in parallel (or antiparallel), which gives a totally symmetric representation, i.e., σ 2 x = σ 2 y = σ 0 in spin space (σ 0 is the unit matrix in spin space). On the other hand, they are orthogonal in the latter case, which leads to the off-diagonal component in spin space and results in Tr[• • • ] = 0.…”

Section: Mpgmentioning

confidence: 99%

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Kirikoshi

Hayami

2023

Phys. Rev. B

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We theoretically investigate an intrinsic nonlinear anomalous Hall effect (INAHE) in space-time (PT ) symmetric antiferromagnetic metals. The INAHE is characterized by an asymmetric and nondissipative part of the second-order electric conductivity tensor in the clean limit in contrast to the Drude-type symmetric conductivity tensor with dissipation. By introducing a multipole description, we show that the emergence of the INAHE is due to active odd-parity magnetic quadrupoles or magnetic toroidal dipoles under magnetic orderings. In order to clarify the microscopic origin of the INAHE, we specifically consider a fundamental tight-binding model of a three-dimensional tetragonal system. We demonstrate that the INAHE arises from the effective coupling between magnetic ordering and antisymmetric spin-orbit interaction. We also discuss essential electron hopping paths driving the INAHE.

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Section: Mpgmentioning

confidence: 99%

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Kirikoshi

Hayami

2023

Phys. Rev. B

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“…With increasing pressure and temperature, the orthopyroxene form (MnGeO3 I) transforms to a clinopyroxene form (MnGeO3II) and then to an ilmenite form (MnGeO3 III) at 3.0 GPa and 987 K (Ringwood & Seabrook, 1963). The magnetic structure of MnGeO3 III has been investigated in a powder neutron diffraction study with the TOF method (Tsuzuki, Ishikawa, Watanabe & Akimoto, 1974). Although that paper and another by Susaki, Konno & Akimoto (1985) include some structural data for MnGeO3 ilmenite, to the best of the authors' knowledge, no structure refinement of this phase has ever been published.…”

Section: Mr=175mentioning

confidence: 99%

Structure of high-pressure MnGeO3 ilmenite

Ross¹,

Reynard

Guyot

1991

Acta Crystallogr C

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“…With increasing pressure and temperature, the orthopyroxene structure transforms to a clinopyroxene structure and then to an ilmenite structure at 3.0 GPa and 987 Κ (Ringwood and Seabrook, 1963). Ross, Reynard and Guyot (1991) refined the structure of MnGe0 3 ilmenite at 1 atm and 298 K, and the magnetic structure of MnGe0 3 ilmenite has been investigated in a powder neutron diffraction study with the TOF method (Tsuzuki, Ishikawa, Watanabe and Akimoto, 1974). Ross, Reynard and Guyot (1991) refined the structure of MnGe0 3 ilmenite at 1 atm and 298 K, and the magnetic structure of MnGe0 3 ilmenite has been investigated in a powder neutron diffraction study with the TOF method (Tsuzuki, Ishikawa, Watanabe and Akimoto, 1974).…”

Section: Introductionmentioning

confidence: 99%

High pressure structural study of MnGeO₃ ilmenite

Ross¹,

Reynard²,

Guyot³

1993

Zeitschrift Für Kristallographie - Crystalline Materials

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The crystal structure of MnGe0 3 ilmenite was refined using Xray intensity data collected at 1 atm, 2.03 GPa, 3.25 GPa, 3.89 GPa and 4.99 GPa, all at room temperature. Compression of the unit cell is anisotropic, with c approximately twice as compressible as a, and c/a decreasing nearly linearly with increasing pressure. The isothermal bulk modulus determined from the cell volume data is 175(3) GPa if K' 0 is assumed to be 4.0. The mean Mn -O distance is more than twice as compressible as the mean Ge -O distance. Within the Mn octahedral site, the longer of the two independent Mn -O bonds decreases by 1.8% in the pressure range studied whereas the shorter bond decreases by 0.8%. Similarly, the longer of the two independent Ge-O bonds is more compressible than the shorter Ge -O bond in the Ge octahedral site. Distortions of the Mn and Ge octahedra do not change significantly with pressure, and the cation sites remain fully ordered at all pressures studied.

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Neutron Diffraction and Paramagnetic Scattering from a High Pressure Phase of MnGeO₃ (Ilmenite)

Cited by 18 publications

References 10 publications

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Structure of high-pressure MnGeO3 ilmenite

High pressure structural study of MnGeO₃ ilmenite

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Neutron Diffraction and Paramagnetic Scattering from a High Pressure Phase of MnGeO3 (Ilmenite)

Cited by 18 publications

References 10 publications

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals

Structure of high-pressure MnGeO3 ilmenite

High pressure structural study of MnGeO3 ilmenite

Contact Info

Product

Resources

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Neutron Diffraction and Paramagnetic Scattering from a High Pressure Phase of MnGeO₃ (Ilmenite)

High pressure structural study of MnGeO₃ ilmenite