DominguezM，Bhagat SM，Lofland S E，et al.Giantmagnetoresistance atmicrowave frequencies[J].Europhys Lett，1995，32（4）:349ˉ353.
[2]
HelmoltV R，Wecker J，Schultz B，et al.Giantnegativemagnetoresistance in perovskitelike La 2/3 Ba 1/3 MnO x ferromagnetic films[J].Phys Rev Lett，1993，71:2331ˉ2333.
[3]
Jin S T，TiefelH，McCormackM，et al.Thousandfold change in resistivity in magnetoresistive LaˉCaˉMnˉO films[J].Science，1994，264:413ˉ415.
汪世林，陈长乐，王跃龙，等.La 0.67 Ca 0.33 MnO 3 薄膜的光致电阻率变化特性[J].物理学报，2004，53（2）:587ˉ591.
[8]
张春霞，虞澜，张鹏翔.La 0.67 Ca 0.33 MnO 3 薄膜中的非欧姆行为研究[J].云南大学学报:自然科学版，2002，26（5）:417ˉ420.
[9]
Joh KW，Lee C H，Lee C E，et al.Effects of oxygenˉplasma treatment in La 0.7 Ca 0.3 MnO 3 thin films[J].Materials Research Bulletin，2004，39:2119ˉ2152.
[10]
Sun J Z，GallagherW J，XiaoG.Observation of large lowˉfieldmagnetoresistance in trilayer perpendicular transportdevicesmade using doped manganate perovskites[J].Appl Phys Lett，1996，69:3266ˉ3268.
[11]
李润伟，王志宏，陈新，等.钙钛矿型稀土锰氧化物La 2/3 Ca 1/3 MnO 3 中Mn位的Ti替代效应[J].物理学报，1999，48（13）:105ˉ110.
[12]
Pietambaram S V，KumarD，Singh R K，et al.Oxygen content and crystallinity effects in pulsedˉlaserˉdeposited lanthanum manˉganite thin films[J].Materials Research Society Symposium Proceedings，2001，617:J3.14.1ˉJ3.14.6.
[13]
Khare N，Singh D P，SinghH K，et al.Preparation and study of silver added La 0.67 Ca 0.33 MnO 3 film[J].J Physics and Chemisˉtry of Solids，2004，65（5）:867ˉ870.
[14]
Shreekala R，RajeswariM，Pai S P，et al.Improved properties ofLa 0.67 Ca 0.33 MnO 3 thin films by addition of silver[J].Appl Phys Lett，1999，74:2857ˉ2859.
[15]
HuangY H，HuangK F.Enhanced ferromagnetic transition and magnetoresistance in granularAgˉadded La 0.7 Ca 0.3 MnO 3 [J].J Solid State Chemistry，2003，174:57ˉ63.
[16]
Yuan Q S.Comment on“Strain effect and the phase diagram ofLa 1-x Ba x MnO 3 thin films”[J].Phys Rev，2004，B70:066401ˉ066403.
[17]
JonkerG H.Magnetic Compoundswith perovskite structure conducting and nonˉconducting compounds[J].Physica，1956，226:707ˉ780.
Ju H J，Gopalakrishnan J，Peng JL，et al.Dependence ofgiantmagnetoresistance on oxygen stoichiometry andmagnetization in polycrystalline La 0.67 Ba 0.33 MnO 3 [J].Phys Rev，1995，B51:6143ˉ6146.
