Using 155Gd Mössbauer spectroscopy down to 27 mK, we show that, in the geometrically frustrated pyrochlore Gd2Sn2O7, the Gd3+ hyperfine levels are populated out of equilibrium. From this, we deduce that the hyperfine field, and the correlated Gd3+ moments which produce this field, continue to fluctuate as $T \to 0$. With a model of a spin 1/2 system experiencing a magnetic field which reverses randomly in time, we obtain an analytical expression for the steady state probability distribution of the level populations. This distribution is a simple function of the ratio of the nuclear spin relaxation time to the average electronic spin-flip time. In Gd2Sn2O7, we find the two time scales are of the same order of magnitude. We discuss the me...
We present a muon spin relaxation study on the Ising pyrochlore Nd2Zr2O7 which develops an all in a...
An adiabatic demagnetization process is studied in Gd2Ti2O7, a geometrically frustrated antiferromag...
Reentrance, the return of a system from an ordered phase to a previously encountered less-ordered on...
8 pages, 4 figuresInternational audienceWe report on very low temperature (27 mK) Mossbauer absorpti...
The strongly correlated disordered phase of two highly frustrated pyrochlore magnets Gd2Ti2O7 and Gd...
This thesis describes µSR experiments which focus on systems where the magnetic ions occupy the vert...
Measurements of the magnetic susceptibility of the frustrated pyrochlore magnet Gd(2)Sn(2)O(7) have ...
This PhD thesis is about geometrically frustrated magnetic materials which crystallise in the pyroch...
Pyrochlores with magnetic rare earth ions are a topic of interest due to unusual results brought abo...
International audienceThe influence of a staggered molecular field in frustrated rare-earth pyrochlo...
20 pages, 18 figures, proceedings of the Zakopane School of Physics (2003)International audienceThe ...
International audienceThe influence of a staggered molecular field in frustrated rare-earth pyrochlo...
This Phd thesis focuses on the study of magnetically frustrated compounds where magnetic ions lie at...
In a system where magnetic ions occupy the vertices of edge or corner sharing triangular units, the ...
International audienceWe report measurements performed on a polycrystalline sample of the pyrochlore...
We present a muon spin relaxation study on the Ising pyrochlore Nd2Zr2O7 which develops an all in a...
An adiabatic demagnetization process is studied in Gd2Ti2O7, a geometrically frustrated antiferromag...
Reentrance, the return of a system from an ordered phase to a previously encountered less-ordered on...
8 pages, 4 figuresInternational audienceWe report on very low temperature (27 mK) Mossbauer absorpti...
The strongly correlated disordered phase of two highly frustrated pyrochlore magnets Gd2Ti2O7 and Gd...
This thesis describes µSR experiments which focus on systems where the magnetic ions occupy the vert...
Measurements of the magnetic susceptibility of the frustrated pyrochlore magnet Gd(2)Sn(2)O(7) have ...
This PhD thesis is about geometrically frustrated magnetic materials which crystallise in the pyroch...
Pyrochlores with magnetic rare earth ions are a topic of interest due to unusual results brought abo...
International audienceThe influence of a staggered molecular field in frustrated rare-earth pyrochlo...
20 pages, 18 figures, proceedings of the Zakopane School of Physics (2003)International audienceThe ...
International audienceThe influence of a staggered molecular field in frustrated rare-earth pyrochlo...
This Phd thesis focuses on the study of magnetically frustrated compounds where magnetic ions lie at...
In a system where magnetic ions occupy the vertices of edge or corner sharing triangular units, the ...
International audienceWe report measurements performed on a polycrystalline sample of the pyrochlore...
We present a muon spin relaxation study on the Ising pyrochlore Nd2Zr2O7 which develops an all in a...
An adiabatic demagnetization process is studied in Gd2Ti2O7, a geometrically frustrated antiferromag...
Reentrance, the return of a system from an ordered phase to a previously encountered less-ordered on...