Synthesis, Structure and Electronic Properties of Phase Change Material Sb55Se45

Authors

Ravhi S. Kumar, University of Nevada Las VegasFollow
Nirup Reddy
Andrew Cornelius, University of Nevada, Las VegasFollow
Rama Venkat, University of Nevada Las Vegas, Department of Electrical & Computer EngineeringFollow

Document Type

Conference Proceeding

Publication Date

2008

Publication Title

International SAMPE Symposium and Exhibition (Proceedings) 2008

Publisher

SAMPE

First page number:

52

Last page number:

57

Abstract

Antimony - Selenium (SS) binary alloys have recently gained much attention due to their application in developing phase change random memory (PRAM) devices. In order to understand the electronic and structural properties of this system in detail, we have synthesized bulk Sb55Se45. Energy dispersive x-ray analysis (EDX), ellipsometry and high temperature x-ray diffraction experiments were performed to characterize the samples. The electronic and structural properties are compared with the thinfilm Sb 65Se35 reported earlier. The results of our experiments show that the crystal structure is influenced mainly by the composition and crystallite size. We have observed the bulk Sb55Se45 crystallize in the Sb2Se3 type orthorhombic structure which is different from the rhombohedral Sb2Te type structure reported for the thinfilms. Diffraction measurements show that the orthorhombic structure stable up to temperatures 120°C Further, the results of room temperature Hall mobility and resistivity measurements indicate that this material as p-type. Ellipsometry indicates a refractive index in the range of 2.0 for visible light.

Keywords

Antimony alloys; Crystal growth; Phase change memory; Selenium crystals--Electric properties

Disciplines

Electrical and Computer Engineering | Electrical and Electronics | Electronic Devices and Semiconductor Manufacturing | Other Electrical and Computer Engineering | Power and Energy | Semiconductor and Optical Materials

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Kumar, R. S., Reddy, N., Cornelius, A., Venkat, R. (2008). Synthesis, Structure and Electronic Properties of Phase Change Material Sb55Se45. International SAMPE Symposium and Exhibition (Proceedings) 2008 52-57. SAMPE.