Synthesis and magnetic properties of transition metal cyclotetraphosphates M2P4O12 (M = Mn, Co, Ni, Cu)

Hindered magnetic order from mixed dimensionalities inCuP2O6

“…The ordering in the 2D sublattice manifests itself by the weak net moment observed below T N . Although this order has not been seen by neutron diffraction, 14 both ESR and the formation of net moment safely confirm the onset of the long-range magnetic order at 8 K, whereas the lack of the magnetic reflections may be ascribed to an insufficient sensitivity of the neutron experiment. Indeed, in a quasi-2D system, an ordered moment of only 0.6 µ B is expected.…”

“…Some magnetic properties of CuP 2 O 6 have been reported before, 14,15 but no conclusive information regarding the nature of magnetism and magnetic order in this compound is available. While magnetic susceptibility and electron spin resonance (ESR) show signatures of a magnetic transition around 8 K, a neutron diffraction experiment failed to detect any magnetic reflections below this temperature.…”

“…While magnetic susceptibility and electron spin resonance (ESR) show signatures of a magnetic transition around 8 K, a neutron diffraction experiment failed to detect any magnetic reflections below this temperature. 14 In the following, we report a combined experimental and computational study of CuP 2 O 6 . In contrast to previous studies that focused only on phenomenological aspects of this material, we provide a detailed microscopic scenario of CuP 2 O 6 and establish the combination of 1D and 2D magnetism taking place on different energy scales, thus leading to a magnetic ordering transition around 8 K with a remarkably low T N /J 0.2.…”

Nanocrystalline manganese dihydrogen phosphate dihydrate Mn(H2PO4)2·2H2O and its decomposition product (Mn2P4O12) obtained by simple precipitation route

“…Most recently, Koleva et al [29,30] reported synthesis, crystal structure and magnetic property of M(H 2 PO 4 ) 2 ·2H 2 O (M = Mg, Mn, Fe, Co, Ni, Zn, Cd). While few studies on the synthesis, crystal structure and magnetic property of Mn 2 P 4 O 12 have been reported [21,31]. However, there is no data in the literature involving any physical and chemical properties of Mn(H 2 PO 4 ) 2 ·2H 2 O and its dehydration product Mn 2 P 4 O 12 .…”

A simple route to synthesize new binary cobalt iron cyclotetraphosphate CoFeP4O12 using aqueous and acetone media

“…The observation of a strong s POP band is known to be the most striking feature of cyclotetraphosphate spectra, along with the presence of the as OPO − band. From X-ray diffraction data [11], it was shown that the crystal structure is monoclinic (space group C2/c) with a cyclic structure of the [P 4 O 12 ] 4− anion. This has been confirmed by the FTIR measurements.…”