Title

Defect Structure Of Langasite-Type Crystals: A Challenge For Applications

Keywords

BAW; Congruency; Defects; Langasites; SAW

Abstract

Whereas quartz crystals are grown hydrothermally, langasites are grown from the melt, by Czochralski. Particularities of this growth method and inherent physicochemical properties of these materials lead to a specific defect sturucture, which actually limits reproducibility in device parameters. In this study, crystals and wafers grown in different laboratories worldwide have been investigated. Striations, inclusions, voids, dislocations, and faceting effects are discussed in terms of their origin and 3D distribution/pattern within the samples, and their effects on device properties (when known). Ways to improve the quality of Czochralski grown langasites and ideas for future materials developments are also given.

Publication Date

1-1-2002

Publication Title

Proceedings of the Annual IEEE International Frequency Control Symposium

Number of Pages

301-306

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0036447178 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0036447178

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