Growth of strongly textured FeCO 3FeCO3 thin films for application in research of nuclear quantum optics with ultrashort-pulsed laser deposition

Chih Ping Yen, Cheng Shiuan Wong, Chi Yu Yeh, Yen Mu Chen, Hsu Hsin Chu, Jiunn Yuan Lin, Jyhpyng Wang, Ping Hsun Lin, Szu Yuan Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Growth of strongly textured FeCO 3FeCO3 thin films on substrates was achieved with ultrashort-pulsed laser deposition using 810-nm, 46-fs ablation pulses. The crystallinity and composition were verified with X-ray diffraction and Raman spectroscopy. Using Mössbauer spectroscopy, it is shown that the deposited FeCO 3FeCO3 thin films possess the film quality required for application in research of nuclear quantum optics. It is found that a relatively low substrate temperature is crucial for growing a strongly textured film of FeCO3FeCO3 while avoiding decomposition of FeCO3FeCO3 into Fe2O 3Fe2O3 and CO2CO2. This supports the importance of the use of ultrashort-pulsed laser deposition in providing adatoms with high mobility for attaining good crystallinity. The surface morphology was characterized by surface profilometry, scanning electron microscopy and atomic force microscopy. It is found to be significantly affected by changing the ablation laser parameters, including laser fluence, pulse duration, and on-target spot size. The results show that the peak deposition flux must be below approximately 0.03 nm/pulse in order to grow a flat film.

Original languageEnglish
Pages (from-to)671-677
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume115
Issue number2
DOIs
StatePublished - May 2014

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