Low-frequency optical response in epitaxial thin films of La0.67Ca0.33MnO3 exhibiting colossal magnetoresistance

Rajeswari, M.; Chen, C. H.; Goyal, Ankit; Kwon, C.; Robson, M. C.; Ramesh, R.; Venkatesan, T.; Lakeou, S.

doi:10.1063/1.116635

Cited by 89 publications

(41 citation statements)

References 4 publications

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“…[33][34][35][36] Technological interest has centered on solar cells, light-emitting diodes, and photoelectric detectors. [37,38] Previous researches showed that these materials represent good properties, such as ultrafast response, high-sensitivity, broad-spectrum and position-sensitivity, as optoelectronic device materials.…”

Section: Ultrafast Photoresponse In Oxide Filmsmentioning

confidence: 99%

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Ni¹,

Zhao²

2011

Femtosecond-Scale Optics

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Section: Ultrafast Photoresponse In Oxide Filmsmentioning

confidence: 99%

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Ni¹,

Zhao²

2011

Femtosecond-Scale Optics

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“…These CMR manganites have the general composition (RE) x (EA) 1-x MnO 3 , where RE is a rare-earth and EA an earthalkaline element. The choice of elements and their ratio x determines the temperature of the metal-insulator transition, and it can be varied over a wide range by adjusting the material composition [6,7]. For low temperature bolometers Nd x Sr (1-x) MnO 3 (NSMO) is appropriate [6], with the transition temperature decreasing with increasing Nd-fraction x. Sensitivities, typically defined through the temperature coefficient of resistance TCR ≡ 1/R × ∂R/∂T, can be around 10%/K, and square resistances for NSMO vary between ~10 and 1000 Ω for film thicknesses from ~20 to 500 nm.…”

Section: A Design Considerationsmentioning

confidence: 99%

Fabrication of Cryogenic Manganite Bolometers to Measure the Total Energy at the LCLS Free Electron X-Ray Laser

Drury

Kolagani

Liang

et al. 2009

IEEE Trans. Nucl. Sci.

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Abstract-We are developing cryogenic bolometers to measure the total energy of the Linac Coherent Light Source (LCLS) free electron X-ray laser that is currently being built at the Stanford Linear Accelerator Center. LCLS will produce ultrashort ~200 fs X-ray laser pulses with ~10 13 photons at 0.8 keV up to ~10 12 photons at 8 keV per pulse at a repeat interval as short as 8 ms, and will be accompanied by a halo of spontaneous undulator radiation. Our bolometer consists of a 375 µm thick Si absorber and a Nd 0.67 Sr 0.33 MnO 3 sensor operated at its metal-insulator transition. It will measure the total energy of each pulse with a precision of <1%, and is designed to meet the conflicting requirements of radiation hardness, sensitivity, linearity over a dynamic range of three orders of magnitude, and readout speed compatible with the LCLS pulse rate. Here we discuss bolometer design and fabrication, and the photoresponse of prototype devices to pulsed optical lasers.

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“…A bolometric response on the manganite film structures has been investigated recently [7,8]. An experience of the optimization of heat and electrical characteristics of film HTSC bolometers [2] has not been still realized in La -Mn structures.…”

Section: (Received July 22 1999; Revised Version December 10' 1999)mentioning

confidence: 99%

Fast Bolometric Response of Bulk La_0.7Sr_0.3MnO₃Electroceramic Structures

et al. 2000

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We report on the performance of a microwave electroceramic bolometer of hybrid Laο.7Srο.3ΜnΟ3/Αl2O3 (0.2 χ 2 χ 4 mm3) structnre. The estimated thermal resistance of the bulk ceramic manganite film-single crystal sapphire interface is about 500 K/W at room temperature. This resistance is the main thermal barrier in the heat sink system and has been found to be slightly dependent on temperature. When compared with the high -Τ superconducting bolometers, the Laο7Srο3ΜnΟ3 microwave electroceramic bolometer works in a more wide temperature range, from 77 Κ to 330 K, excluding the narrow temperature interval at the metal-insulator phase transition (T = 230 K). The microwave electroceramic bolometer sensitivity and the time constant at room temperature have been found to be 0.1 V/W and 100 ms, respectively. To improve the bolometer performance the point contact has been fabricated by a break junction technique. The optimization of a microwave electroceramic bolometer design brought to a considerable improvement of basic bolometer characteristics. The microWave sensitivity was about 0.3 V/W and the time constant was less than 100 ns.PACS numbers: 07.57. Κp, 85.60.Gz, 72.15.Gd The recent progress of film technology in the creation of bolometers and microbolometers using the multi-component materials was achieved at the developing of devices on the base of high temperature superconductors (HTSC). The increasing interest in this field is related to the high superconducting phase transition. The film technology of H TSC assumes the relatively simple production of bolometers and allows to vary the frequency, sensitivity, and speed of response in a widerange due to applications of sublayers, heat barriers, and optimization of (991)

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Low-frequency optical response in epitaxial thin films of La0.67Ca0.33MnO3 exhibiting colossal magnetoresistance

Cited by 89 publications

References 4 publications

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Fabrication of Cryogenic Manganite Bolometers to Measure the Total Energy at the LCLS Free Electron X-Ray Laser

Fast Bolometric Response of Bulk La_0.7Sr_0.3MnO₃Electroceramic Structures

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Low-frequency optical response in epitaxial thin films of La0.67Ca0.33MnO3 exhibiting colossal magnetoresistance

Cited by 89 publications

References 4 publications

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Ultrafast Photoelectric Effect in Oxide Single Crystals and Films

Fabrication of Cryogenic Manganite Bolometers to Measure the Total Energy at the LCLS Free Electron X-Ray Laser

Fast Bolometric Response of Bulk La0.7Sr0.3MnO3Electroceramic Structures

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Product

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Fast Bolometric Response of Bulk La_0.7Sr_0.3MnO₃Electroceramic Structures