Magnetic phase diagram of antiferroquadrupole ordering in HoB2C2

Abstract

The magnetic phase diagram for antiferro-quadrupole (AFQ) ordering in tetragonal HoB${}_2$C${}_2$ has been investigated by measurements of elastic constants $C_{11}$, $C_{44}$ and $C_{66}$ in fields along the basal $x$-$y$ plane as well as the principal [001]-axis. The hybrid magnet (GAMA) in Tsukuba Magnetic Laboratory was employed for high field measurements up to 30 T. The AFQ phase is no longer observed above 26.3 T along the principal [001] axis in contrast to the relatively small critical field of 3.9 T in fields applied along the basal [110] axis. The quadrupolar intersite interaction of $O_{xy}$ and/or $O_2^2$ is consistent with the anisotropy in the magnetic phase diagram of the AFQ phase in HoB${}_2$C${}_2$.

arXiv commentPhys. Rev. B. (2005) in press. approx 8 pages, 10 figures

References in corpus (4)

• Direct Observation of Antiferro-Quadrupolar Ordering - Resonant X-ray Scattering Study of DyB2C2
• Lattice Distortion and Octupole Ordering Model in CexLa1-xB6
• Observation of the antiferroquadrupolar order in DyB2C2 by resonant x-ray scattering
• Lattice Distortion and Resonant X-Ray Scattering in DyB2C2

Cited by in corpus (4)

• First-principles theory of magnetic multipoles in condensed matter systems
• Revealing the nature of antiferro-quadrupolar ordering in Cerium Hexaboride: CeB${}_6$
• Mean-field Study of Antiferromagnetic and Antiferroquadrupolar Orderings in Tetragonal CeCoSi
• Effect of core-valence intra-atomic quadrupolar interaction in resonant x-ray scattering at the Dy M${}_{4,5}$ edges in DyB${}_2$C${}_2$