Coupled dimerized alternating-bond quantum spin chains in the distorted honeycomb-lattice magnet CuSbO

Piyakulworawat, C.*; Morita, Katsuhiro*; Fukumoto, Yoshiyuki*; Hsieh, W.-Y.*; Chen, W.-T.*; Nakajima, Kenji; Kawamura, Seiko; Zhao, Y.*; Wannapaiboon, S.*; Piyawongwatthana, P.; et al.

Physical Review Research (Internet), 8(1), p.013247_1 - 013247_16, 2026/03

https://doi.org/10.1103/vdgg-d128

We analyze powder-averaged inelastic neutron scattering and magnetization data for the distorted honeycomb compound CuSbO using a first-order dimer expansion calculation and quantum Monte Carlo simulations. We show that, in contrast to the previously proposed honeycomb lattice model, CuSbO accommodates interacting dimerized spin chains with alternating ferromagnetic-antiferromagnetic couplings along the chain. Moreover, unlike the typical couplings observed in other Cu-based distorted honeycomb magnets, the spin chains in CuSbO primarily couple through an antiferromagnetic coupling that arises between the honeycomb layers, rather than the expected interchain coupling in the layers. This finding reveals a different magnetic coupling scheme for CuSbO. In addition, utilizing X-ray spectroscopy and transmission electron microscopy, we also refine the crystal structure and stacking-fault model of the compound.

Study of the beam loss localization in the J-PARC RCS

Kojima, Kunihiro; Harada, Hiroyuki; Saha, P. K.

Proceedings of 22nd Annual Meeting of Particle Accelerator Society of Japan (Internet), p.289 - 293, 2026/03

https://www.pasj.jp/web_publish/pasj2025/proceedings/PDF/WEP0/WEP036.pdf

Uncontrolled beam loss in the 3 GeV rapid-cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC) was investigated. A significant amount of uncontrolled beam loss was observed, especially at each arc section, despite the RCS being equipped with a collimation system designed to collect halo particles with one scatterer and five absorbers. Based on the time-dependence of the beam loss measured in the collimation system and arc sections, the particles lost at the arc sections are found to be likely scattered by the absorber rather than the scatterer, contrary to the design of the collimation system. By changing the configuration of the collimation system, it was determined that the absorber through which the majority of the lost particles passed was the second absorber. In addition, the trajectory of such a particle was identified by using numerical simulation assuming the lattice structure of the RCS.

Relationships among non-allophanic/allophanic indicators in six Japanese forest Andosol profiles; Implications for soil classification and genesis

Alam, M. M.*; Yamakita, Eri*; Tamanna, S.*; Thae, E. P.*; Koarashi, Jun; Atarashi-Andoh, Mariko; Abe, Yukiko; Nakayama, Masataka; Mori, Yuki*; Hiradate, Shuntaro*

Soil Science and Plant Nutrition, 12 Pages, 2026/00

https://doi.org/10.1080/00380768.2026.2616655

A Metallic -wave magnet with commensurate spin helix

Yamada, Rinsuke*; Birch, M. T.*; Baral, P. R.*; Okumura, Shun*; Nakano, Ryota*; Gao, S.*; Ezawa, Motohiko*; Nomoto, Takuya*; Masell, J.*; Ishihara, Yuki*; et al.

Nature, 646(8086), p.837 - 842, 2025/10

https://doi.org/10.1038/s41586-025-09633-4

Unveiling the local effects of PTL passivation in PEM Electrolyzers through gas and current mapping using operando neutron radiography and polarized neutron imaging

Karimi, V.*; Qvistgaard, C. H.*; Schmidt, S.*; Wolfertz, A.*; Parker, J. D.*; Kai, Tetsuya; Hayashida, Hirotoshi*; Shinohara, Takenao; Angelis, S. D.*; Tengattini, A.*; et al.

ACS Applied Materials & Interfaces, 17(36), p.50742 - 50752, 2025/08

https://doi.org/10.1021/acsami.5c11706

Magnetism of kagome metals (FeCo)Sn studied by SR

Cai, Y.*; Yoon, S.*; Sheng, Q.*; Zhao, G.*; Seewald, E. F.*; Ghosh, S.*; Ingham, J.*; Pasupathy, A. N.*; Queiroz, R.*; Lei, H.*; et al.

Physical Review B, 111(21), p.214412_1 - 214412_17, 2025/06

https://doi.org/10.1103/PhysRevB.111.214412

Synthesis of BaSiH hydridosilicate at high pressures; A Bridge to BaSiH polyhydride

Beyer, D. C.*; Spektor, K.*; Vekilova, O. Y.*; Grins, J.*; Barros Brant Carvalho, P. H.*; Leinbach, L. J.*; Sannemo-Targama, M.*; Bhat, S.*; Baran, V.*; Etter, M.*; et al.

ACS Omega (Internet), 10(15), p.15029 - 15035, 2025/04

https://doi.org/10.1021/acsomega.4c10502

Hydridosilicates featuring SiH octahedral moieties represent a rather new class of compounds with potential properties relating to hydrogen storage and hydride ion conductivity. Here, we report on the new representative BaSiH obtained from reacting the Zintl phase hydride BaSiH with H fluid at pressures above 4 GPa and subsequent decompression to ambient pressure. It consists of complex SiH ions, which are octahedrally coordinated by Ba counterions. The arrangement of Ba and Si atoms deviates only slightly from an ideal fcc NaCl structure. IR and Raman spectroscopy showed SiH bending and stretching modes in the ranges 800-1200 and 1400-1800 cm, respectively. BaSiH is thermally stable up to 95C above which decomposition into BaH and Si takes place. DFT calculations indicated a direct band gap of 2.5 eV. The discovery of BaSiH consolidates the compound class of hydridosilicates, accessible from hydrogenations of silicides at gigapascal pressures (10 GPa). The structural properties of BaSiH suggest that it presents an intermediate (or precursor) for further hydrogenation at considerably higher pressures to the predicted superconducting polyhydride BaSiH.

Residual stress measurement and lifetime evaluation of railway axles by neutron scattering technology

Hu, F.-F.*; Qin, T.-Y.*; Ao, N.*; Xu, P. G.; Su, Y. H.; Parker, J. D.*; Shinohara, Takenao; Shobu, Takahisa; Kang, G.-Z.*; Ren, M.-M.; et al.

Journal of Traffic and Transportation Engineering, 25(2), p.75 - 93, 2025/04

https://dx.doi.org/10.19818/j.cnki.1671-1637.2025.02.005

https://transport.chd.edu.cn/en/article/doi/10.19818/j.cnki.1671-1637.2025.02.005

https://transport.chd.edu.cn/cn/article/doi/10.19818/j.cnki.1671-1637.2025.02.005

A Lightweight shape-memory alloy with superior temperature-fluctuation resistance

Song, Y.*; Xu, S.*; Sato, Shunsuke*; Lee, I.*; Xu, X.*; Omori, Toshihiro*; Nagasako, Makoto*; Kawasaki, Takuro; Kiyanagi, Ryoji; Harjo, S.; et al.

Nature, 638, p.965 - 971, 2025/02

https://doi.org/10.1038/s41586-024-08583-7

How to start a network? Experience in networking and achievements of the IRPA Young Generation Network

Andresz, S.*; Betos, C. M.*; Ha, W. H.*; Hamida, T.*; Hussain, B. S.*; Kabrt, F.*; Nusrat, O.*; Michaelidesova, A.*; Lima, T. V.*; Movsisyan, N.*; et al.

Annals of the ICRP, 53(1_Suppl), p.38 - 45, 2024/12

https://doi.org/10.1177/01466453241283931f

Since its establishment in 2018, the IRPA (International Radiation Protection Association) Young Generation Network (YGN) has created several dynamics under the framework of its Strategic Agenda to promote the representation of the young generation, professional development, experience transfer, relationship and communication of students, young professionals and scientists in radiation protection and its allied fields. This article first reports on the activities performed from 2018 until today, with highlights on some important events, collaborations and publications. The IRPA YGN have made these achievements with the essential support of its Leadership Committee, the various national Young Generation Networks, and the IRPA organization and its Associate Societies. Then, the insights and experiences obtained from these activities are discussed and used to inform how the IRPA YGN aims to achieve its on-going activities and continue to follow the ways paved in the Strategic Agenda 2022-2024. It is expected that the identification of the backbone elements supporting a young generation network and also the very specific challenges can be useful for the future management of the IRPA YGN and existing national YGN and inspire the creation of other young generation networks.