Infrared properties of single crystal MgAl
                        2
                        O
                        4
                        , a substrate for high-temperature superconducting films

Tzuen-Rong Yang; Herng-Er Horng; Hong-Chang Yang; L. J. Jang; W. N. Kang; S. S. Yom

doi:10.1016/0921-4534(94)91947-X

Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films

Tzuen-Rong Yang, Herng-Er Horng, Hong-Chang Yang, L. J. Jang, W. N. Kang, S. S. Yom

Department of Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We study and analyze the infrared properties of single crystal MgAl ₂ O ₄ , an important substrate for high-T _c superconducting films, from 10 to 300 cm ^-1 and 4.2 to 350K. A number of infrared active modes between 20-150 cm ^-1 have been observed. Some of these modes such as 68, 72, 82, 103 cm ^-1 are consist with the earlier reports by inelastic neutron scattering method and characterized as transverse acoustic phonon modes. Our measurements also shows extra modes such as 35, 44, 56, 75, 82 cm ^-1 . The spectra in the far-infrared region has about 60% transmission at 4.2K and opaque above 180cm ^-1 . The transparent properties of single crystal MgAl ₂ O ₄ in far infrared region in liquid helium temperature is especially good for HTSC thin films substrate.

Original language	English
Pages (from-to)	1445-1446
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	235-240
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4534(94)91947-X
Publication status	Published - 1994 Jan 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Yang, T-R., Horng, H-E., Yang, H-C., Jang, L. J., Kang, W. N., & Yom, S. S. (1994). Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films Physica C: Superconductivity and its applications, 235-240(PART 2), 1445-1446. https://doi.org/10.1016/0921-4534(94)91947-X

Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films . / Yang, Tzuen-Rong ; Horng, Herng-Er; Yang, Hong-Chang; Jang, L. J.; Kang, W. N.; Yom, S. S.

In: Physica C: Superconductivity and its applications, Vol. 235-240, No. PART 2, 01.01.1994, p. 1445-1446.

Research output: Contribution to journal › Article › peer-review

Yang, T-R , Horng, H-E, Yang, H-C, Jang, LJ, Kang, WN & Yom, SS 1994, ' Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films ', Physica C: Superconductivity and its applications, vol. 235-240, no. PART 2, pp. 1445-1446. https://doi.org/10.1016/0921-4534(94)91947-X

Yang T-R , Horng H-E, Yang H-C, Jang LJ, Kang WN, Yom SS. Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films Physica C: Superconductivity and its applications. 1994 Jan 1;235-240(PART 2):1445-1446. https://doi.org/10.1016/0921-4534(94)91947-X

Yang, Tzuen-Rong ; Horng, Herng-Er ; Yang, Hong-Chang ; Jang, L. J. ; Kang, W. N. ; Yom, S. S. / Infrared properties of single crystal MgAl ₂ O ₄ , a substrate for high-temperature superconducting films In: Physica C: Superconductivity and its applications. 1994 ; Vol. 235-240, No. PART 2. pp. 1445-1446.

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abstract = " We study and analyze the infrared properties of single crystal MgAl 2 O 4 , an important substrate for high-T c superconducting films, from 10 to 300 cm -1 and 4.2 to 350K. A number of infrared active modes between 20-150 cm -1 have been observed. Some of these modes such as 68, 72, 82, 103 cm -1 are consist with the earlier reports by inelastic neutron scattering method and characterized as transverse acoustic phonon modes. Our measurements also shows extra modes such as 35, 44, 56, 75, 82 cm -1 . The spectra in the far-infrared region has about 60% transmission at 4.2K and opaque above 180cm -1 . The transparent properties of single crystal MgAl 2 O 4 in far infrared region in liquid helium temperature is especially good for HTSC thin films substrate.",

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