Electronic transport and 1/f noise studies in 250 MeV 107Ag ion irradiated La0.75Ca0.25MnO3 thin films
Electronic transport and 1/f noise studies in 250 MeV 107Ag ion irradiated La0.75Ca0.25MnO3 thin films
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250 MeV 107Ag 离子辐照 La0.75Ca0.25MnO3 薄膜中的电子输运和 1/f 噪声研究
DOI：
10.1063/1.371385
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Ogale
中科院分区：
文献类型：
--
作者：
S. Arora;Ravi Kumar;Rajendra Singh;D. Kanjilal;G. Mehta;R. Bathe;S. Patil;S. Ogale
研究了250 MeV 107Ag离子辐照对La0.75Ca0.25MnO3 （LCMO）薄膜电输运和低频传导噪声性能的影响。观察到金属-绝缘体转变温度Tp和电阻率随离子影响的系统变化。已经注意到，对于以1011个离子/cm2辐照的样品，Tp比未辐照的样品增加了10 K，铁磁金属态的电阻率比未辐照的样品降低，而我们的噪声结果显示归一化噪声Sv/V2单调增加，作为离子影响的函数。观察到的LCMO薄膜噪声特性的变化与快速重离子辐照引起晶格缺陷效应的一般预期一致。
The influence of 250 MeV 107Ag ion irradiation on electrical transport and low frequency conduction noise properties of La0.75Ca0.25MnO3 (LCMO) thin films have been investigated. A systematic variation of metal–insulator transition temperature Tp and resistivity as a function of ion fluence has been observed. It has been noted that for the sample irradiated with 1011 ions/cm2, Tp increased by 10 K and the resistivity is decreased in the ferromagnetic metallic state from that of an unirradiated sample, whereas our noise results show a monotonic increase in the normalized noise Sv/V2, as a function of ion fluence. The observed modifications in the noise properties of the irradiated LCMO thin films are consistent with the general expectation concerning the effect of swift heavy ions irradiation induced lattice defects.