IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Lattice-distortion Induced Magnetic Intermediate magnetisation state in Dy2Ti2O7 and Ho2Ti2O7
Autor/es:
H. D. ROSALES; F. GÓMEZ ALBARRACÍN; A. STEPKE; D. PRABHAKARAN; S. A. GRIGERA; D. C. CABRA; H. D. ROSALES; F. GÓMEZ ALBARRACÍN; D. PRABHAKARAN; A. STEPKE; S. A. GRIGERA; D. C. CABRA; R. BORZI; G. L. ROSSINI; A. P. MACKENZIE; R. BORZI; G. L. ROSSINI; A. P. MACKENZIE
Lugar:
Trieste
Reunión:
Conferencia; Conference on Long-Range-Interacting Many Body Systems: from Atomic to Astrophysical Scales; 2016
Institución organizadora:
ICTP
Resumen:
(poster) We study the effects of lattice deformations on spin ice, with Ising spins coupled by nearest neighbor exchange and long range dipolar interactions in the presence of a magnetic field in the pyrochlore lattice. We describe the lattice energy according to the Einstein model and integrate out the phonon degrees of freedom. The resulting effective Hamiltonian is studied by Monte Carlo simulations. We show how this Hamiltonian reproduces the experimental measurements of the magnetic susceptibility in the two most studied spin-ice compounds, Dy2Ti2O7 and Ho2Ti2O7, including the formation of a phase of intermediate polarisation, and gives important information about the possible ground state of real spin-ice systems. Our work suggests an unusual situation in which distortions might contribute to the preservation rather than relief of the effects of frustration
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