1993
DOI: 10.1126/science.262.5139.1554
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High- T c Molecular-Based Magnets: Ferrimagnetic Mixed-Valence Chromium(III)-Chromium(II) Cyanides with T c at 240 and 190 Kelvin

Abstract: Molecular-based magnets with high magnetic-ordering temperatures, T(c), can be obtained by mild chemistry methods by focusing on the bimetallic and mixed-valence transition metal micro-cyanide of the Prussian blue family. A simple orbital model was used to predict the electronic structure of the metal ions required to achieve a high ordering temperature. The synthesis and magnetic properties of two compounds, [Cr(5)(CN)(12)].10H(2)O and Cs(0.75) [Cr(2.125)(CN)(6)].5H(2)O, which exhibited magnetic-ordering temp… Show more

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Cited by 816 publications
(364 citation statements)
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“…Some of the Prussian blue analogues (PBAs) [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] show thermal-induced phase transitions and photomagnetic effects. [39][40][41][42][43][44][45] In such materials, a strong cooperativity operates since transition-metal ions are bridged by CN ligands with a three-dimensional network structure.…”
Section: Introductionmentioning
confidence: 99%
“…Some of the Prussian blue analogues (PBAs) [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] show thermal-induced phase transitions and photomagnetic effects. [39][40][41][42][43][44][45] In such materials, a strong cooperativity operates since transition-metal ions are bridged by CN ligands with a three-dimensional network structure.…”
Section: Introductionmentioning
confidence: 99%
“…[1][2][3] In this regard, cyanido-bridged heterobimetallic assemblies derived from [M(CN) 6 ] 3À (M = Cr, Fe, Co) building blocks and various transition metal or rare earth metal ions have been extensively explored. [4][5][6][7][8] More recently, [M(CN) 8 ] 3À/4À (M = Mo, W) anions have become attractive building blocks for the synthesis of new cyanido-bridged networks with remarkable magnetic and photomagnetic properties. [9][10][11] Octacyanidometallates profit from the enhanced p backbonding and superexchange efficiency resulting from the greater diffuseness and radial distribution of 4d/5d orbitals as compared with 3d orbitals.…”
mentioning
confidence: 99%
“…According to the nature of M and M', ferro-, ferri-and antiferro-magnets can be obtained. The highest critical temperatures reported so far [2], 240 K for the ferrimagnet [Cr5(CN)12]10H20, are already close to room temperature, but in this case the role of organic chemistry is rather meager (is a cyanide organic or inorganic? ).…”
Section: Prussian Blue Analoguesmentioning
confidence: 99%