Cation disorder and size effects on the magnetic transition in Ba-containing ferromagnetic manganites

Savosta, M. M.; Ulyanov, A.N.; Starostyuk, N.Yu.; Maryško, M.; Novák, P.

doi:10.1007/s100510051020

Cited by 12 publications

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“…To verify the generality of the procedure, we measured the temperature dependence of NMR in additional three manganites: La 0.7 Ca 0.15 Ba 0.15 MnO 3 (T C ϭ302 K͒, La 0.7 Ba 0.3 MnO 3 (T C ϭ337 K͒ and La 0.7 Sr 0.15 Ba 0.15 MnO 3 (T C ϭ352.5 K͒. 17 Indeed, we have found that the procedure may be applied equally well to these compounds. The resulting dependence of on T C is displayed in Fig.…”

Section: Discussionmentioning

confidence: 99%

Crossover between the second- and first-order magnetic transition in ferromagnetic manganites

et al. 1999

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The temperature dependence of the magnetic moment in La 0.7 Sr 0.3 MnO 3 and La 0.7 Ca 0.3 MnO 3 ferromagnetic manganites was studied by means of dc magnetic measurements and by NMR on 55 Mn nuclei. In addition, for temperatures close to T C , the ac susceptibility and the NMR spin-lattice relaxation were determined. From the results it follows that the phase transition changes from the conventional continuous second order for La 0.7 Sr 0.3 MnO 3 (T C ϭ364 K͒ to more abrupt but close to continuous for La 0.7 Ca 0.3 MnO 3 (T C ϭ265 K͒. The change of the character of the phase transition is explained on the basis of the mean field theory of double exchange taking into account the spontaneous magnetostriction. ͓S0163-1829͑99͒04833-X͔

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Section: Discussionmentioning

confidence: 99%