Open AccessThe effect of grain boundaries on magnetic and transport properties in colossal magnetoresistance particle film
Author(s) -
Peigang Li,
Ming Lei,
Weihua Tang,
Song Peng-Yun,
Chinping Chen,
Linghong Li
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.2328
Subject(s) - materials science , grain boundary , colossal magnetoresistance , condensed matter physics , magnetoresistance , ferromagnetism , paramagnetism , grain size , magnetic field , microstructure , metallurgy , physics , quantum mechanics
La0.67Ca0.33MnO3 grain films have been grown by pulsed electron beam deposition technology,and their magnetic and electronic transport properties investigated in detail.The influence of grain boundaries on the physical properties of La0.67Ca0.33MnO3 grain films were studied.Grain boundaries weaken the coupling between grains,resulting in a cluster spin glass state.The metal-insulator transition temperature (Tp) was shifted far below the ferromagnetic-paramagnetic transition temperature (Tc).At low temperatures,the electron transportation indicates a weak localization behavior,and under low magnetic fields,the intrinsic magnetoresisance effect is screened by the influence of grain boundaries.