{ "item_title" : "Localized to Itinerant Electronic Transition in Perovskite Oxides", "item_author" : [" John B. Goodenough", "S. L. Cooper", "T. Egami "], "item_description" : "Interest in the transition metal oxides with perovskite related structures goes back to the 1950s when the sodium tungsten bronzes NaxWO3 were shown to be metallic1 ], the system Lal_xSr MnO3 was found to contain a ferromagnetic conductive phase2], and La0.sSr0.sCoO3 was reported to be a ferromagnetic metal, but with a peculiar magnetization of 1.5 #a/Co atom3]. Stoichiometric oxide perovskites have the generic formula AMO3 in which the A site is at the center of a simple cubic array of M sites; the oxide ions form (1804)) M O M bridges to give an MO3 array of corner shared MO6/2 octahedra and the larger A cations have twelvefold oxygen coordination. Mismatch between the A O and M O equilibrium bond lengths introduces internal stresses. A compressive stress on the MO3 array is accommodated by a lowering of the M O M bond angle from 180to (1804)); a tensile stress on the M O M bonds is accommodated by the formation of hexagonal polytypes4].", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/3/64/208/696/3642086969_b.jpg", "price_data" : { "retail_price" : "329.99", "online_price" : "329.99", "our_price" : "329.99", "club_price" : "329.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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