Cationic disorder effects in complex oxide laser materials and phosphors

ABSTRACTComplex oxide perovskites, namely strontium aluminum tantalum oxide (SAT) and strontium aluminum niobium oxide (SAN) were recently investigated to be potential substrate materials for HTSC films in microwave applications. Single crystals were prepared by laser heated pedestal growth technique (LHPG). We report Raman vibrational spectrum studies on them for the first time. Order-disorder effects of (Al, Ta) and (Al, Nb) sites were studied with particular interests by comparing Raman spectra of single-crystal samples with ceramic samples. Influences of B sites (Ta and Nb) on O-O modes are discussed in relation to their dielectric properties.

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Investigation of cationic disorder effects on the transport and magnetic properties of perovskite Pr0.7-xRExSr0.3MnO3 (x=0.0,0.2; RE = Nd, Sm, & Gd)

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2020.167011 ◽

2020 ◽

Vol 512 ◽

pp. 167011

Author(s):

Anand Pal ◽

Ashok Rao ◽

Dhananjaya Kekuda ◽

B.S. Nagaraja ◽

Rittwick Mondal ◽

...

Keyword(s):

Magnetic Properties ◽

Disorder Effects ◽

Cationic Disorder

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Letter Spectroscopic analogy approach in selective search for new Ce 3+ -activated all-solid-state tunable ultraviolet laser materials

Journal of Modern Optics ◽

10.1080/095003498151915 ◽

1998 ◽

Vol 45 (2) ◽

pp. 221-226 ◽

Cited By ~ 6

Author(s):

M. A. DUBINSKII, K. L. SCHEPLER V. V.

Keyword(s):

Solid State ◽

Laser Materials ◽

Ultraviolet Laser ◽

Selective Search

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Structural/Property Relationships for Optical Materials

MRS Proceedings ◽

10.1557/proc-329-215 ◽

1993 ◽

Vol 329 ◽

Author(s):

Vivien D.

Keyword(s):

Crystal Structure ◽

Optical Properties ◽

Electronic Structure ◽

Chemical Composition ◽

Field Strength ◽

Optical Materials ◽

Site Occupancy ◽

Laser Materials ◽

Crystal Field Strength ◽

The Matrix

AbstractIn this paper the relationships between the crystal structure, chemical composition and electronic structure of laser materials, and their optical properties are discussed. A brief description is given of the different laser activators and of the influence of the matrix on laser characteristics in terms of crystal field strength, symmetry, covalency and phonon frequencies. The last part of the paper lays emphasis on the means to optimize the matrix-activator properties such as control of the oxidation state and site occupancy of the activator and influence of its concentration.

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