Magnetic properties of crystalline La_{0.9}Ca_{0.1}MnO_{3} : Comparison of bulk and nanometer-sized samples Academic Article uri icon

abstract

  • ac and dc magnetic measurements have been employed to probe and compare magnetic ordering in bulk and nanometer-sized La 0.9 Ca 0.1 MnO 3 single crystals. About the same cationic content was determined in both types of the samples. However, the magnetic ground state of the bulk crystal is characterized by a complex mixture of antiferromagnetically and ferromagnetically ordered phases, while the ground state of the nanosample seems to be ferromagnetic and coexisting with the superparamagnetic state at T< 240 K. The results are discussed in terms of the different randomness of indirect ferromagnetic exchange interactions mediated by the bound holes.

publication date

  • January 1, 2006