Low-temperature magnetisation process in the cubic pyrochlore quantum antiferromagnet, Er2Ti2O7
نویسندگان
چکیده
منابع مشابه
Spin waves and quantum criticality in the frustrated XY pyrochlore antiferromagnet Er2Ti2O7.
We report detailed measurements of the low temperature magnetic phase diagram of Er2Ti2O7. Heat capacity and time-of-flight neutron scattering studies of single crystals reveal unconventional low-energy states. Er3+ magnetic ions reside on a pyrochlore lattice in Er2Ti2O7, where local XY anisotropy and antiferromagnetic interactions give rise to a unique frustrated system. In zero field, the gr...
متن کاملEnergetic selection of ordered states in a model of the Er2Ti2O7 frustrated pyrochlore XY antiferromagnet
We consider the possibility that the discrete long-range ordered states of Er2Ti2O7 are selected energetically at the mean field level as an alternative scenario that suggests selection via thermal fluctuations. We show that nearest neighbour exchange interactions alone are not sufficient for this purpose, but that anisotropies arising from excited single ion crystal field states in Er2Ti2O7, t...
متن کاملQuantum disorder in the two-dimensional pyrochlore Heisenberg antiferromagnet
We present the results of an exact diagonalization study of the spin-1/2 Heisenberg antiferromagnet on a two-dimensional version of the pyrochlore lattice, also known as the square lattice with crossings or the checkerboard lattice. Examining the low energy spectra for systems of up to 24 spins, we find that all clusters studied have non-degenerate ground states with total spin zero, and big en...
متن کاملQuantum effects in a half-polarized pyrochlore antiferromagnet.
We study quantum effects in a spin-3/2 antiferromagnet on the pyrochlore lattice in an external magnetic field, focusing on the vicinity of a plateau in the magnetization at half the saturation value, observed in CdCr2O4 and HgCr2O4. Our theory, based on quantum fluctuations, predicts the existence of a symmetry-broken state on the plateau, even with only nearest-neighbor microscopic exchange. ...
متن کاملKrizan 1 A single crystal high-temperature pyrochlore antiferromagnet
We report the magnetic characterization of the frustrated transition metal pyrochlore NaCaCo2F7. This material has high spin Co in CoF6 octahedra in a pyrochlore lattice, and disordered non-magnetic Na and Ca on the large-atom sites in the structure. Large crystals grown by the floating zone method were studied. The magnetic susceptibility is isotropic, the Co moment is larger than the spin-onl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2013
ISSN: 1434-6028,1434-6036
DOI: 10.1140/epjb/e2013-40404-9