H. Katori

activity

20242026

collaborators

9 papers

cond-mat.str-el2026

Tetrahedrally ferromagnetic correlations and a glassy-freezing anomaly in the breathing pyrochlore magnet $AgInC r_{4} S_{8}$ with partial $A$ -site disorder

Yuya Haraguchi, Masahiro Kitamura, Masaki Gen +6

We investigate the chromium breathing pyrochlore sulfide $AgInC r_{4} S_{8}$ , a chromium-based thiospinel, by synchrotron x-ray and neutron powder diffraction, dc magnetization,…

cond-mat.mtrl-sci2026

Selective Octahedral Accommodation of Cr $^{3 +}$ and Weak Magnetic Connectivity in the Sugilite Analogue KNa $_{2}$ Cr $_{2}$ Li $_{3}$ Si $_{12}$ O $_{30}$

Yuya Haraguchi, Taishu Aoki, Daisuke Nishio-Hamane +1

We report the synthesis of the Cr analogue of sugilite, KNa $_{2}$ Cr $_{2}$ Li $_{3}$ Si $_{12}$ O $_{30}$ , in the milarite-type framework. Rietveld refinement of a composition-conserving antisi…

cond-mat.str-el2026

Evolution of crystal field and intraionic interactions in the ilmenite $A$ IrO $_{3}$ ( $A$ = Mg, Zn, Cd) and hyperhoneycomb $I^^{2}$ -ZnIrO $_{3}$

Yuya Haraguchi, Hiroko Aruga Katori, Kenji Ishii +1

Spin-orbit Mott insulators with the $t_{2 g}^{5}$ electron configuration are promising platforms for the Kitaev spin liquid, yet fine-tuning of their crystal structures is essential t…

cond-mat.mtrl-sci2026

Ilmenite-Type Ca $_{x}$ IrO $_{3}$ via Topochemical Ion Exchange: Stacking Faults and Low-Temperature Magnetic Anomaly

Haruki Kira, Yuya Haraguchi, Wataru Yokoshima +2

We report the synthesis of an ilmenite-type polymorph of Ca $_{x}$ IrO $_{3}$ distinct from the known post-perovskite and perovskite phases, via low-temperature topochemical Ca $^{2 +}$ /2Na…

cond-mat.str-el2025

Crystalline water intercalation into the Kitaev honeycomb cobaltate Na $_{2}$ Co $_{2}$ TeO $_{6}$

Masaaki Ito, Yuya Haraguchi, Teruki Motohashi +4

We herein report the successful intercalation of water molecules into the layered honeycomb lattice of Na $_{2}$ Co $_{2}$ TeO $_{6}$ , a Kitaev-candidate compound, to obtain the hydrated phas…

cond-mat.str-el2025

Frustrated $J_{1} - J_{2}$ Diamond Lattice Antiferromagnet Co $_{2}$ Ti $_{3}$ O $_{8}$ with a Vacancy-ordered Spinel Structure Synthesized via a Topochemical Reaction

Rio Kumeda, Yuya Haraguchi, Daisuke Nishio-Hamane +3

Metastable Co $_{2}$ Ti $_{3}$ O $_{8}$ was synthesized through a topochemical reaction using Li $_{2}$ CoTi $_{3}$ O $_{8}$ as the precursor, resulting in a vacancy-ordered spinel structure. Crystal st…

Tetrahedrally ferromagnetic correlations and a glassy-freezing anomaly in the breathing pyrochlore magnet AgInCr4​S8​ with partial A-site disorder

Selective Octahedral Accommodation of Cr3+ and Weak Magnetic Connectivity in the Sugilite Analogue KNa2​Cr2​Li3​Si12​O30​

Evolution of crystal field and intraionic interactions in the ilmenite AIrO3​ (A = Mg, Zn, Cd) and hyperhoneycomb I^2-ZnIrO3​

Ilmenite-Type Cax​IrO3​ via Topochemical Ion Exchange: Stacking Faults and Low-Temperature Magnetic Anomaly

Crystalline water intercalation into the Kitaev honeycomb cobaltate Na2​Co2​TeO6​