M. Kawamata

activity

20242026

collaborators

9 papers

cond-mat.str-el2026

Dipolar-driven mean-field criticality in the ferrimagnet Eu $_{2}$ MnSi $_{2}$ O $_{7}$

Masahiro Kawamata, Maxim Avdeev, Yusuke Nambu

We report mean-field critical behavior in Eu $_{2}$ MnSi $_{2}$ O $_{7}$ , a melilite-type ferrimagnet with spin-only Eu $^{2 +}$ and Mn $^{2 +}$ moments and negligible orbital contributions. Magn…

cond-mat.mtrl-sci2026

Refining hydrogen positions in Î±-FeOOH through combined neutron diffraction and computational techniques

Yusuke Nambu, Akihide Kuwabara, Masahiro Kawamata +3

The hydrogen positions and magnetic structure of goethite $I^\pm$ -FeOOH, a key component of iron rust, were examined through neutron diffraction. All symmetry-allowed magnetic structu…

cond-mat.str-el2026

Collinear Magnetic Structure in the Diamond Network Magnet EuTi $_{2}$ Al $_{20}$

Masahiro Kawamata, Ryuji Higashinaka, Takeshi Matsumura +5

The magnetic structure of EuTi $_{2}$ Al $_{20}$ , in which magnetic Eu $^{2 +}$ ions form a diamond network, was investigated using neutron and resonant X-ray diffraction on powder and si…

cond-mat.str-el2026

Emergent Anomalous Hall Effect in the Eu-Based Compound with a Diamond Network: The Centrosymmetric Cubic Antiferromagnet EuTi $_{2}$ Al $_{20}$

Ryuji Higashinaka, Kohsuke Sato, Ryosei Ideura +2

The centrosymmetric cubic compound EuTi $_{2}$ Al $_{20}$ , in which magnetic Eu ions form a diamond network, undergoes an antiferromagnetic transition at T $_{N}$ = 3.3 K and exhibits meta…

cond-mat.mtrl-sci2025

Anisotropic Band-Split Magnetism in Magnetostrictive CoFe $_{2}$ O $_{4}$

Harry Lane, Guratinder Kaur, Masahiro Kawamata +9

Single crystal spinel CoFe $_{2}$ O $_{4}$ exhibits the largest room-temperature saturation magnetostriction among non-rare-earth compounds and a high Curie temperature ( $T_{c} \sim 780$ K)…

cond-mat.str-el2024

Field-Induced Criticality in YbCu4Au

T. Taniguchi, K. Osato, H. Okabe +19

YbCu4Au is a unique material exhibiting multiple quantum fluctuations simultaneously. In this study, we investigated the field-induced criticality in YbCu4Au, based on comprehensiv…

Dipolar-driven mean-field criticality in the ferrimagnet Eu2​MnSi2​O7​

Refining hydrogen positions in Î±-FeOOH through combined neutron diffraction and computational techniques

Collinear Magnetic Structure in the Diamond Network Magnet EuTi2​Al20​

Emergent Anomalous Hall Effect in the Eu-Based Compound with a Diamond Network: The Centrosymmetric Cubic Antiferromagnet EuTi2​Al20​

Anisotropic Band-Split Magnetism in Magnetostrictive CoFe2​O4​

Field-Induced Criticality in YbCu4Au

Dipolar-driven mean-field criticality in the ferrimagnet Eu $_{2}$ MnSi $_{2}$ O $_{7}$

Collinear Magnetic Structure in the Diamond Network Magnet EuTi $_{2}$ Al $_{20}$

Emergent Anomalous Hall Effect in the Eu-Based Compound with a Diamond Network: The Centrosymmetric Cubic Antiferromagnet EuTi $_{2}$ Al $_{20}$

Anisotropic Band-Split Magnetism in Magnetostrictive CoFe $_{2}$ O $_{4}$