Modulation of Insulator-Metal Transition Temperature by Visible Light in La7/8Sr1/8MnO3 Thin Film

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2010,（9）
• 页码范围: 207-210
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/27/9/097504

摘要

Effects of magnetic field and light illumination on the electrical transport properties of La7/8 Sr1/8 MnO3 thin film grown on a Si substrate are investigated.The film shows an insulator-metal transition at Tp ≈ 191.9 K and a low-temperature resistance minimum at Tmin≈ 48 K in darkness.Both magnetic field and light illumination shift the insulator-metal transition temperature Tp to be higher,while the low-temperature transport properties of the film induced by them show different trends.That is,the magnetic field and light illumination make the Tmin shift to lower and higher temperatures,respectively.The enhancement of both Tp and Tmin under light illumination could be explained in terms of photoinducecl hole-doping and demagnetization effects of La7/8Sr1/8MnO3.