Magnetic structure of divalent europium compound EuGa${}_4$ studied by single crystal time-of-flight neutron diffraction

Abstract

The magnetic structure of the intermetallic compound EuGa${}_4$ was investigated using single-crystal neutron diffraction with the time-of-flight (TOF) Laue technique on the new diffractometer SENJU at MLF of J-PARC. In spite of high neutron absorption of Eu, a vast number of diffraction spots were observed without isotope enrichment. The magnetic reflections were appeared at the positions with the diffraction indices of $h+k+l\ne 2n$ below 16 K, indicating that the ordering vector is $\mathbf{q}=(000)$. Continuous evolution of magnetic reflection intensity below $T_{\mathrm{N}}$ follows a squared Brillouin function for $S$=7/2. By adopting a wavelength-dependent absorption collection, the magnetic structure of EuGa${}_4$ was revealed that a nearly full magnetic moment of 6.4${\mu }_{\mathrm{B}}$ of Eu lies within the basal plane of the lattice. The present study reveals a well-localized divalent Eu magnetism in EuGa${}_4$ and demonstrates a high ability of SENJU to investigate materials with high neutron absorption.

5 pages, 5 figures, 2 Tables. submitted to J. Phys. Soc. Jpn

References in corpus (4)

• Magnetic ground state of superconducting Eu(Fe0.88Ir0.12)2As2: A combined neutron diffraction and first-principles calculation study
• Optical study of archetypical valence-fluctuating Eu-systems
• $\mu$SR and Neutron Diffraction Investigations on Reentrant Ferromagnetic Superconductor Eu(Fe{0.86}Ir{0.14})2As2
• Search for Magnetic Order in Superconducting RuSr2Eu1.2Ce0.8Cu2O10

Cited by in corpus (1)

• Spin order and fluctuations in the EuAl${}_4$ and EuGa${}_4$ topological antiferromagnets: A $\mu$SR study