Optical response of single-crystal (La,Ca)MnOδthin films

Jianhua Hao, X. T. Zeng, H. K. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)


The optical response in single-crystal films of La0.67Ca0.33MnOδ(LCMO) is examined as a function of bias current, temperature, incident laser power, and light modulation frequency. The LCMO thin films are deposited on (110) NdGaO3substrates via a facing-target sputtering method. The sample is irradiated by a He-Ne laser to demonstrate the bolometric effect. The incident light power is attenuated by inserting neutral density filters. The sample is biased with a dc current. The optical response voltage across the sample is recorded by a lock-in amplifier. For highly resistive samples, the resistance measurements are conducted with a high impedance electrometer, and the optical response signal is extracted across a load resistance in series with the sample.
Original languageEnglish
Pages (from-to)1810-1812
Number of pages3
JournalJournal of Applied Physics
Issue number3
Publication statusPublished - 1 Feb 1996
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physics and Astronomy (miscellaneous)


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