<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Critical Behavior of La0.7Ca0.3MnO3 Nanoparticles"^^ . "We used the modified Arrott plot method to analyze magnetic-field dependences of magnetization, M(H), around the ferromagneticparamagnetic\r\n(FM-PM) phase-transition temperature (TC) of three nanocrystalline La0.7Ca0.3MnO3 samples with average crystallite sizes d = 40,\r\n23, and 16 nm. The analyses obtained the values of critical parameters to be TC µ 261 K, ¢ = 0.485 « 0.005, £ = 1.051 « 0.094 and ¤ = 3.1 «\r\n0.1 for the sample with d = 40 nm, TC µ 252 K, ¢ = 0.525 « 0.010, £ = 0.893 « 0.139 and ¤ = 2.7 « 0.1 for d = 23 nm, and TC µ 236 K,\r\n¢ = 0.621 « 0.008, £ = 0.825 « 0.007 and ¤ = 2.2 « 0.2 for d = 16 nm. With these critical values, the M(H) data points around TC of the\r\nsamples fall into two universal branches of a scaling function M(H, ¾) = «¾«\r\n¢f«(H/«¾«\r\n¢+£\r\n), with ¾ = (T ¹ TC)/TC, f+ for T > TC and f¹ for T < TC.\r\nThe results reveal that the crystallite-size reduction of nanoparticles decreases the TC value. This is ascribed to the decrease of FM doubleexchange\r\ninteractions between Mn3+ and Mn4+ ions, which is related to the ¢ change from 0.485 for d = 40 nm to 0.621 for d = 16 nm,\r\ncorresponding to the change in FM order from the long-range type to the short-range one."^^ . "2015" . "56" . "9" . . "Materials Transactions"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . "L. Phan"^^ . "T."^^ . "L. Phan T."^^ . . "O. Ho"^^ . "T."^^ . "O. Ho T."^^ . . "C. Yu"^^ . "S."^^ . "C. Yu S."^^ . . "V. Manh"^^ . "T."^^ . "V. Manh T."^^ . . "D. Thanh"^^ . "T."^^ . "D. Thanh T."^^ . . "A. Ho"^^ . "T."^^ . "A. Ho T."^^ . . "Duc Thang"^^ . "Pham"^^ . "Duc Thang Pham"^^ . . . . . "HTML Summary of #1797 \n\nCritical Behavior of La0.7Ca0.3MnO3 Nanoparticles\n\n" . "text/html" . . . "Engineering Physics" . .