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Crystals grown from molten salts

Dr Ryutaro Okuma

Long Term Visitor

Research theme

  • Quantum materials

Sub department

  • Condensed Matter Physics

Research groups

  • Quantum magnetism and quantum phase transitions
ryutaro.okuma@physics.ox.ac.uk
Telephone: 01865 (2)72310
Clarendon Laboratory, room 051,106
sites.google.com/view/rokuma
  • About
  • Publications

Synthesized pharmacosiderite

Compass-model physics on the hyperhoneycomb lattice in the extreme spin-orbit regime: Data archive

University of Oxford (2024)

Authors:

Ryutaro Okuma, Kylie MacFarquharson, Roger D Johnson, David Voneshen, Pascal Manuel, Radu Coldea

Abstract:

This dataset contains plain text files containing the data presented in the corresponding manuscript.
More details from the publisher
Details from ORA

Selective synthesis and crystal chemistry of candidate rare earth Kitaev materials honeycomb and hyperhoneycomb Na2PrO3: Data archive

University of Oxford (2024)

Authors:

Ryutaro Okuma, Kylie MacFarquharson, Radu Coldea

Abstract:

This dataset contains plain text files containing the data presented in Figures 1, 4, 6, 7 and 8 of the corresponding manuscript published in Inorganic Chemistry.
More details from the publisher
Details from ORA

Negative-chirality order in S = 1/2 kagome antiferromagnet CdCu3(OH)6(NO3)2·H2O

Physical Review B American Physical Society 106:2 (2022) 24401

Authors:

Yoshihiko Ihara, Ryoga Hiyoshi, Masakazu Shimohashi, Kaoru Hayashi, Ryutaro Okuma, Fabio Orlandi, Pascal Manuel, Gøran J Nilsen, Zenji Hiroi

Abstract:

Neutron diffraction and nuclear magnetic resonance (NMR) measurements have been used to analyze the magnetic structure in the S = 1 2 kagome antiferromagnet CdCu 3 ( OH ) 6 ( NO 3 ) 2 ⋅ H 2 O . Below the magnetic ordering temperature T N ≃ 4 K , magnetic Bragg reflections at (101) and (100) were found in the neutron diffraction pattern, which suggests a q = 0 magnetic structure. Furthermore, the vector spin chirality for the q = 0 structure was successfully identified from the internal field direction obtained by the 14 N -NMR measurement, previous magnetization measurements, and magnetic symmetry analysis. Our findings point to a chirality-ordered magnetic structure with negative vector chirality and ⟨ 100 ⟩ anisotropy.
More details from the publisher
Details from ORA
More details

Magnetic frustration in a van der Waals metal CeSiI

Physical Review Materials American Physical Society (APS) 5:12 (2021) l121401

Authors:

Ryutaro Okuma, Clemens Ritter, Gøran J Nilsen, Yoshinori Okada
More details from the publisher
More details

Magnetic frustration in a van der Waals metal CeSiI

ArXiv 2107.1381 (2021)

Authors:

Ryutaro Okuma, Clemens Ritter, Gøran J Nilsen, Yoshinori Okada
Details from ArXiV

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