| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hansen, Thomas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Newly developed aerodynamic levitation device for neutron scattering experiments
- 2024Impact of Mn/Ni and Li/(Mn+Ni) ratios on phase equilibrium and electrochemical performance of the high voltage spinel LiNi0.5Mn1.5O4citations
- 2023Magnetic and structural properties of the iron silicide superconductor LaFeSiH
- 2022An Easy-to-Use Custom-Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteriescitations
- 2022An Easy‐to‐Use Custom‐Built Cell for Neutron Powder Diffraction Studies of Rechargeable Batteriescitations
- 2021Investigation into the magnetic properties of CoFeNiCryCux alloyscitations
- 2021Investigation into the magnetic properties of CoFeNiCryCux alloyscitations
- 2020High-pressure, high temperature synthesis of a mesoporous α-quartz/bismuth nanowire compositecitations
- 2020Structural Characteristics of Fresh, Thermally Aged, Poisoned and Regenerated Pt-Pd Catalysts Studied by Analytical Transmission Electron Microscopy
- 2019High-pressure, high temperature insertion of bismuth in the siliceous zeolite silicalite-1citations
- 2017Absence of magnetic long range order in Y2CrSbO7: bond-disorder induced magnetic frustration in a ferromagnetic pyrochlorecitations
- 2015Expression, receptor binding, and biophysical characterization of guinea pig insulin desB30citations
- 2013Reduction of Sr2MnO4 investigated by high temperature in situ neutron powder diffraction under hydrogen flow.citations
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article
Absence of magnetic long range order in Y2CrSbO7: bond-disorder induced magnetic frustration in a ferromagnetic pyrochlore
Abstract
The consequences of random nonmagnetic-ion dilution for the pyrochlore family Y2(M1−xNx )2O7 (M = magnetic ion, N = nonmagnetic ion) have been investigated. As a first step, we experimentally examine the magnetic properties of Y2CrSbO7 (x = 0.5), in which the magnetic sites (Cr3+) are percolative. Although the effective Cr-Cr spin exchange is ferromagnetic, as evidenced by a positive Curie-Weiss temperature, CW 19.5 K, our high-resolution neutron powder diffraction measurements detect no sign of magnetic long-range order down to 2 K. In order to understand our observations, we construct a lattice model to numerically study the bond disorder introduced by the ionic size mismatch between M and N, which reveals that the bond disorder percolates at xb0.23, explaining the absence of magnetic long-range order. This model could be applied to a series of frustrated magnets with a pyrochlore sublattice, for example, the spinel compound Zn(Cr1−xGax )2O4, wherein a Néel to spin glass phase transition occurs between x = 0.2 and 0.25 [Lee et al., Phys. Rev. B 77, 014405 (2008)]. Our study stresses the non-negligible role of bond disorder on magnetic frustration, even in ferromagnets. D