| 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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Greaves, Colin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2020Structural, Magnetic, Magnetocaloric, and Magnetostrictive Properties of Pb1-xSrxMnBO4(x = 0, 0.5, and 1.0)citations
- 2018Magnetic ordering of the cryogenic magnetic cooling mineral gaudefroyite.citations
- 2017Absence of magnetic long range order in Y2CrSbO7: bond-disorder induced magnetic frustration in a ferromagnetic pyrochlorecitations
- 2017Topotactic fluorine insertion into the channels of FeSb2O4-related materials.citations
- 2015Supplementary data for The Structures and Magnetic Properties of FexCo1 xSb2O4 and MnxCo1 xSb2O4, 0 ≤ x ≤ 1
- 2014Variable temperature neutron diffraction study of crystal structure and transport pathways in oxide ion conductors Bi12.5Ln1.5ReO24.5 (Ln=Lu, Er)citations
- 2013Unprecedented High Solubility of Oxygen Interstitial Defects in La1.2Sr0.8MnO4+δ up to δ ∼ 0.42 Revealed by In Situ High Temperature Neutron Powder Diffraction in Flowing O2.citations
- 2013Reduction of Sr2MnO4 investigated by high temperature in situ neutron powder diffraction under hydrogen flow.citations
- 2012Structural and magnetic characterisation of CoSb2O4, and the substitution of Pb2+ for Sb3+citations
- 2011Crystallographic and magnetic characterisation of the brownmillerite Sr2Co2O5citations
- 2011The synthesis, structure, magnetic and electrical properties of FeSb2-xPbxO4citations
- 2011High-temperature redox chemistry of La1.5+xSr0.5-xCo0.5Ni0.5O4+delta (x = 0.0, 0.2) studied in situ by neutron diffractioncitations
- 2010The ionic conductivity and local environment of cations in Bi9ReO17citations
- 2010The structure and ionic conductivity of the fluorite-related isostructural materials Bi20Ca7NbO39.5, Bi10.75Ca4.375GaO22 and quenched Bi9ReO17citations
- 2010Crystal structure and oxide ion conductivity in cubic (disordered) and tetragonal (ordered) phases of Bi(25)Ln(3)Re(2)O(49) (Ln = La, Pr)citations
- 2010LaSrCoFeO5, LaSrCoFeO5F and LaSrCoFeO5.5: new La-Sr-Co-Fe perovskitescitations
- 2010Synthesis and characterization of La1.5+xSr0.5-xCo0.5Ni0.5O4 +/-delta (x=0, 0.2)citations
- 2009Influence of cooling rate on the structure and composition of NaxCoO2 (x similar to 0.65)citations
- 2009Structural and Magnetic Characterisation of La1+xSr1-xCo0.5M0.5O4 +/-delta (M = Cr, Mn)citations
- 2009Synthesis and characterization of La0.8Sr1.2Co0.5M0.5O4−δ (M=Fe, Mn)citations
- 2008Structural and magnetic characterisation of Aurivillius material Bi2Sr2Nb2.5Fe0.5O12citations
- 2008Synthesis and characterization of the K2NiF4 phases La1+xSr1-xCo(0.5)Fe(0.5)O(4-delta) (x=0, 0.2)citations
- 2007Crystal structure and electrical characterisation of Bi2NbO5F: an Aurivillius oxide fluoridecitations
- 2006Synthesis and structural and magnetic characterization of mixed manganese-copper n=1 Ruddlesden-Popper phases
- 2006Crystal structure and magnetic properties of Ca₂MnAlO₅.₅, an n=3 brownmillerite phasecitations
- 2005Structural and magnetic characterisation of Bi2Sr1.4La0.6Nb2MnO12 and its relationship to Bi2Sr2Nb2MnO12citations
- 2004The structural chemistry and oxide ion conducting properties of the new bismuth oxide sulphate Bi₈O₁₁(SO₄)citations
- 2004Crystallographic and magnetic structures of Y₀.₈Sr₂.₂Mn₂GaO₈-ɗ : a new vacancy-ordered perovskite structurecitations
- 2003YCa₃(MnO)₃(BO₃)₄ : A manganese borate containing ferromagnetic chains on a kagome latticecitations
- 2003Synthesis and Characterisation of the Reduced Double-Layer Manganite Sr₃Mn₂O₆₊xcitations
- 2003The structural chemistry of Bi₁₄MO₂₄ (M=Cr,Mo,W) phases: bismuth oxides containing discrete MO₄ tetrahedracitations
- 2002PbBa2Y1-xCaxCu307+delta:synthesis, structure and superconductivity
- 2002Staged fluorine insertion into manganese oxides with Ruddlesden-Popper structures:LaSrMnO4F and La1.2Sr1.8Mn2O7Fcitations
- 2002Structures & Magnetic Ordering in the BrownMillerite Phases, Sr₂MnGaO₅ and Ca₂MnALO₅citations
- 2002Synthesis and characterisation of reduced single layer manganite Sr₂MnO₃.₅₊xcitations
- 2001Cation distribution and magnetic structure of the ferrimagnetic spinel NiCO₂O₄citations
- 2001Synthesis and structure of Sr₂MnGaO₅, a new layered manganese oxidecitations
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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