Crystal Growth and Structure of the New Ferrimagnetic Oxyphosphate PbFe₃O(PO₄)₃

Abstract

A new oxyphosphate, PbFe 3 O(PO 4 ) 3 , has been discovered and its structure has been characterized by single-crystal XRD between 293 and 973 K (monoclinic, space group P2 1 /m, a = 7.5826 Å, b = 6.3759 Å, c = 10.4245 Å, β = 99.956°, Z = 2, at r.t.). Direct-current (DC) magnetic susceptibility and specific heat measurements performed on single crystals re-

Growth and spectroscopic properties of 6Li- and 10B-enriched crystals for heat-scintillation cryogenic bolometers used in the rare events searches

“…The Eu-concentration of the 6 Li 6 Eu( 10 BO 3 ) 3 crystals was measured by scanning the (-102) and (010) facets at a depth down to 2.4 mm by means of EPMA (Cameca SX 100, 20 keV electron beam, already described in ref. 16), which gave 5.18 6 10 21 Eu cm 23 .…”

Ba3FeS4Br: A 0D Iron‐Based Chalcohalide with Unusual Magnetic Properties

“…Iron‐based compounds have aroused strong world‐wide interest since the discovery of superconductivity in LaFeAsO 1– x F x ( T c ≈ 26 K)1 and LaFePO 1– x F x ( T c ≈ 5 K) 2. The fascinating properties of iron‐based superconductors not only provide new opportunities for breakthroughs in superconductivity,3–13 but have also inspired intensive efforts in the exploratory synthesis of new iron‐based compounds,14–20 in particular, mixed‐anion compounds. Mixed‐anion compounds often exhibit unique bonding characteristics: In these compounds, a highly electronegative element (e.g., O, F, Cl) tends to form strong bonding with a highly electropositive element (e.g., alkali, alkaline‐earth and rare‐earth metals), whereas a poorly electronegative element (e.g., P, As, S, Se, Te) tends to form stable bonding with a poorly electropositive element (e.g., transition metal or p‐block element) 21–25.…”

On the synthesis, characterization and magnetic properties of two new phases discovered in the PbO–Fe2O3–P2O5 system

“…Finally it turned out that this compound was isolated serendipitously when we tried to grow single crystals of PbFe 3 O(PO 4 ) 3 by a combination of PbFe 2 (P 2 O 7 ) 2 flux and Bridgman methods, as described in Ref. [2]. The quartz tube which we used in replacement of the Pt one cracked during the growth run.…”

“…A selective summary of optical and magneto-optical most salient features in several phosphates has been given recently in Ref. [2], to which we should add the discovery in 1970 of the cooperative luminescence mechanism of Yb 3 þ -pairs in the YbPO 4 crystals [3]. Among them, Fe 3 þ and Mn 2 þ phosphates are particularly interesting to investigate for several reasons.…”

“…Magnetization slow decays could lead in the future to magnetic information storage at the building units level of the crystal structure. Recently, PbFe 3 O(PO 4 ) 3 single crystals were synthesized by El Hafid et al [2] by a combination of Bridgman and hightemperature solution methods and found to exhibit a sequence of three FM-like magnetization divergencies at 31.8, 23.4 and 10.0 K.…”