Structure Refinement and Magnetic Properties of C–Fe(PO3)3 Studied by Neutron Diffraction and Mössbauer Techniques

Elbouaanani, L.K.; Malaman, B.; Gerardin, R.

doi:10.1006/jssc.1999.8479

Cited by 29 publications

(31 citation statements)

References 18 publications

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“…3 where small magnetic frustrations in the (100) layers were observed. 15,19 These results confirm that the different |MO 6 | octahedral geometry together with the electronic configurations of the metal ions are responsible for the magnetic behaviour observed in the M(PO 3 ) 3 (M~Cr, Mo, Fe) metaphosphates.…”

Section: Iii4 Magnetostructural Correlations In the B And C Type Crsupporting

confidence: 78%

“…Difficulties to refine the nuclear structure in the isostructural Fe(PO 3 ) 3 phase with D2B neutron diffraction data were also observed. 15,19 The presence of a superstructure detected from single crystal X-ray investigations for this M(PO 3 ) 3 C-type structure 4-9 could affect to the neutron peaks hampering satisfactory refinement.…”

Section: Iii2 Nuclear Structurementioning

confidence: 98%

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Magnetic structures of the B and C type Cr(PO₃)₃metaphosphates

et al. 2004

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The B and C type Cr(PO 3 ) 3 metaphosphates were synthesised by ceramic methods with control of the Cr/P ratio in the reaction medium. Neutron powder diffraction experiments and heat-capacity measurements were carried out on polycrystalline samples. The C-type [Cr(PO 3 ) 3 ] compound is ordered as a three-dimensional Heisenberg antiferromagnet with a J/k value of 0.3 K whereas the B-type [Cr 2 P 6 O 18 ] phase shows that the magnetic susceptibility depends strongly on the magnetic field at temperatures less than 4 K suggesting the presence of some ferromagnetic contributions in the ordered state. The heat-capacity measurements of C-type Cr(PO 3 ) 3 exhibit a three-dimensional magnetic ordering (l-type) peak at 4.2 K. The absence of an appreciable anomaly in the magnetic heat capacity obtained above T N suggests a small short-range order in this Cr(PO 3 ) 3 metaphosphate. The magnetic structures of both compounds are consistent with the existence of predominant antiferromagnetic superexchange interactions via |PO 4 | tetrahedra between the Cr(III) ions. In the C-type phase, the magnetic moments arranged in (100) ferromagnetic layers are antiparallel with those of the neighbouring layers stabilising an antiferromagnetic structure. The magnetic moments lie in the xz plane pointing 13u out of the x axis. In the B-type phase, the presence of a weak ferromagnetic component is observed. Magnetostructural correlations in both chromium compounds indicate that only super-superexchange interactions via one or two phosphate groups are present. The [Cr-O-P and O-P-O] angles of the magnetic exchange pathways show typical values of antiferromagnetic couplings. The competition between different magnetic interactions in Cr(PO 3 ) 3 through super-superexchange pathways is not strong enough to cause magnetic frustration as observed in other metaphosphates.

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Section: Iii4 Magnetostructural Correlations In the B And C Type Crsupporting

confidence: 78%

Section: Iii2 Nuclear Structurementioning

confidence: 98%

Magnetic structures of the B and C type Cr(PO₃)₃metaphosphates

et al. 2004

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“…However, it can be noticed in the insets of figures 1 and 2 that there is a phase transition taking place at around T = 10 K for Fe(PO 3 ) 3 and 20 K for Fe 2 P 2 O 7 . The magnetic measurements reported for these materials suggest the phase transitions involved for both of these iron phosphate compounds are antiferromagnetic [28,[30][31][34][35][36].…”

Section: Resultsmentioning

confidence: 91%

Low temperature heat capacity Study of Fe(PO3)3 and Fe2P2O7

Shi

Zhang

Schlesinger

et al. 2013

The Journal of Chemical Thermodynamics

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“…In this structure, each iron atom is connected to six surrounding iron atoms through six Fe -O -P -O -Fe links which are antiferromagnetic. Actually, the magnitude of Fe -O -P -O -Fe is an open question and has been discussed by Gleitzer [4]; the neutron diffraction study of Fe(PO 3 ) 3 [18] and FeP 3 SiO 11 [19] confirmed the antiferromagnetic magnitude of these interactions. In order to verify these hypotheses, the neutron powder diffraction study of FePbP 2 O 7 is in progress.…”

Section: Magnetic Study Of Fepbp 2 Omentioning

confidence: 76%