Tricritical points in La-based ferromagnetic manganites
authors Amaral, VS; Araujo, JP; Pogorelov, YG; Sousa, JB; Tavares, PB; Vieira, JM; Algarabel, PA; Ibarra, MR
nationality International
journal JOURNAL OF APPLIED PHYSICS
keywords FIRST-ORDER; MAGNETIC TRANSITION; PARAMAGNETIC PHASE; PARAMETERS; CROSSOVER; 2ND-ORDER
abstract A detailed study of the magnetization M(H,T) of manganites near T-C is presented. Analysis, in the framework of Landau theory of phase transitions (G=G(0)+1/2AM(2)+1/4BM(4)+1/6CM(6)-MH) reveals that for La0.67Ca0.33MnO3 (T-C=267 K), La0.8MnO3 (T-C=250 K), and La0.60Y0.07Ca0.33MnO3 (T-C=150 K) the phase transition is first-order and the B coefficient is temperature dependent, negative near T-C. In field (H
publisher AMER INST PHYSICS
issn 0021-8979
year published 2003
volume 93
issue 10
beginning page 7646
ending page 7648
digital object identifier (doi) 10.1063/1.1558271
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000182822600004
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journal impact factor 2.286
5 year journal impact factor 2.138
category normalized journal impact factor percentile 54.87
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