doi:

DOI: 10.3724/SP.J.1077.2014.13562

Journal of Inorganic Materials (无机材料学报) 2014/29:7 PP.753-757

Influence of Growth Temperature and Oxygen Pressure on Laser-induced Voltage Effect of La0.67Sr0.33MnO3:Ag0.08 Thin Films


Abstract:
La0.67Sr0.33MnO3:Ag0.08 (LSMO:Ag0.08) polycrystalline ceramics were prepared by chemical co-precipitation method, and then La0.67Sr0.33MnO3:Ag0.08 thin films were prepared on vicinal cut LaAlO3 (LAO) substrates by pulsed laser deposition (PLD) technique. Effects of growth temperature and oxygen pressure on structure, electrical transport properties and laser-induced voltage (LIV) effect were investigated. The results show that the maximum LIV peak (Up), the figure of merit (Fm) and anisotropy Seebeck coefficient (?S) are obtained for LSMO:Ag0.08 thin films when growth temperature and oxygen pressure are 790 ℃ and 45 Pa, respectively. The LIV enhancement of LSMO:Ag0.08 thin films is due to the anisotropy of the Seebeck coefficient, which is produced by long range cooperative Jahn-Teller distortions under optimal growth temperature and oxygen pressure conditions.

Key words:growth temperature,oxygen pressure,pulsed laser deposition,laser-induced voltage,anisotropic Seebeck coefficient

ReleaseDate:2016-07-11 11:25:04



[1] ZHANG P X, ZHU S J, LIU X, et al. Effect of thermal annealing on structural electrical and magnetic properties of Ag-doped La0.67Ca0.33MnO3 thin films grown on LaAlO3 substrates. Japanese Journal of Applied Physics, 2006, 45(2): 727-729.

[2] ZHANG P X, WANG C, ZHANG G Y, et al. LaCaMnO3 thin film laser energy/power meter. Optics & Laser Technology, 2004, 36(4): 341-343.

[3] LIU X, ZHANG H, HU J T, et al. Data acquisition of laser induced voltage for rare earth oxide thin films. Chinese Journal of Lasers, 2008, 35(10): 1585-1590.

[4] CAO M G, ZHANG H, HU J T, et al. Ag doping effects on La2/3Ca1/3Mno3 thin films and laser-induced voltage effect. Chinese Journal of Lasers, 2011, 38(3): 0307001-1-4.

[5] JU H L, KWON C, LI Q, et al. Giant magnetoresistance in La1-xSrxMnOz films near room temperature. Appl. Phys. Lett., 1994, 65(16): 2108-2110.

[6] YAMADA Y, HINO O, NOHDO S, et al. Polaron ordering in low-doping La1-xSrxMnO3. Phys. Rev. Lett., 1996, 77(5): 904-907.

[7] CHANG C L, KLEINHAMMES A, MOULTON W G, et al. Symmetry-forbidden laser-induced voltages in YBa2Cu3O7. Phys. Rev. B., 1990, 41(16): 11564-11567.

[8] KWOK H S, ZHENG J P, YING Q Y, et al. Nonthermal optical response of Y-Ba-Cu-O thin films. Appl. Phys. Lett., 1989, 54(24): 2473-2475.

[9] LENGFELLNER H, KREMB G, SCHNELLB?GL A, et al. Giant voltages upon surface heating in normal YBa2Cu3O7?films suggesting an atomic layer thermopile. Appl. Phys. Lett., 1992, 60(4): 501-503.

[10] HABERMEIER H U, LI X H, ZHANG P X, et al. Anisotropy of thermoelectric properties in La2/3Ca1/3MnO3 thin films studied by laser-induced transient voltages. Solid State Communications, 1999, 110(9): 473-478.

[11] ZHANG P X, WANG C, TAN S L, et al. Improving the performance of thermoelectric devices by doping Ag in LaPbMnO3 thin films. Journal of Crystal Growth, 2008, 310(11): 2732-2737.

[12] LIU X, YAN Y Z, CHEN Q M, et al. Laser-induced voltage (LIV) enhancement of La2/3Sr1/3MnO3 films with Ag addition. Appl. Phys. A., 2013, (Doi: 10.1007/s00339-013-8013-8).

[13] HOU C S, CHOU C C, CHENG H F. Effect of processing parameters on structure of pulsed laser deposited La0.5Sr0.5CoO3 thin films. Applied Surface Science, 1997, 113-114: 207-211.

[14] URUSHIBARA A, MORITOMO Y, ARIMA T, et al. Insulator-metal transition and giant magnetoresistance in La1-xSrxMnO3. Phys. Rev. B., 1995, 51(20): 14103-14109.

[15] LIU X, YAN Y Z, CHEN Q M, et al. Effects of Ag doping on the electrical properties of La2/3A1/3MnO3 (A=Ca, Sr, Ba) composites materials. Journal of Inorganic Materials, 2013, 28(12): 1307-1312.

[16] HALDER S, KRUPANIDHI S B. Growth and characterization of Ba(Zr0.1Ti0.9)O3 thin films deposited by pulsed excimer laser ablation. Solid State Communications, 2002, 122(7): 429-432.

[17] ZHANG G Y, ZHANG P X, ZHANG H, et al. Figure merit for detectors based on Laser-Induced thermoelectric voltages in La1-xCaxMnO3 and YBa2Cu3O7-thin films. Chin. Phys. Lett., 2005, 22(9): 2379-2381.

[18] YU L, WANG Y, ZHANG P X, et al. Epitaxial La0.9Ca0.1MnO3 films grown on vicinal cut substrates for the investigation of resistivity and thermoelectric anisotropy. Journal of Crystal Growth, 2011, 322(1): 41-44.

[19] SALAMON M B, JAIME M. The physics of manganites: structure and transport. Rev. Mod. Phys., 2001, 73(3): 583-628.