Published July 30, 2012 | Version v1
Journal article Metadata-only

Phase change behaviors of Zn-doped Ge2Sb2Te5 films

Creators

  • 1. Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)
  • 2. Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083 (China)
  • 3. Laser Physics Centre, Australian National University, Canberra, ACT 0200 (Australia)
  • 4. Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)

Description

Zn-doped Ge2Sb2Te5 phase-change materials have been investigated for phase change memory applications. Zn15.16(Ge2Sb2Te5)84.84 phase change film exhibits a higher crystallization temperature (∼258 °C), wider band gap (∼0.78 eV), better data retention of 10 years at 167.5 °C, higher crystalline resistance, and faster crystallization speed compared with the conventional Ge2Sb2Te5. The proper Zn atom added into Ge2Sb2Te5 serves as a center for suppression of the face-centered-cubic (fcc) phase to hexagonal close-packed (hcp) phase transition, and fcc phase has high thermal stability partially due to the bond recombination among Zn, Sb, and Te atoms.

Additional details

Identifiers

DOI
10.1063/1.4742144;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
101
Journal Issue
5
Journal Page Range
p. 051906-051906.5
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44048050
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANTIMONY COMPOUNDS; ATOMS; CHEMICAL BONDS; CRYSTALLIZATION; CRYSTAL-PHASE TRANSFORMATIONS; DOPED MATERIALS; ENERGY GAP; FCC LATTICES; GERMANIUM COMPOUNDS; GLASS; HCP LATTICES; INHIBITION; PHASE CHANGE MATERIALS; RECOMBINATION; SEMICONDUCTOR MATERIALS; SOLIDS; STABILITY; TELLURIUM COMPOUNDS; THIN FILMS; ZINC ADDITIONS
Descriptors DEC
ALLOYS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CUBIC LATTICES; FILMS; HEXAGONAL LATTICES; MATERIALS; PHASE TRANSFORMATIONS; ZINC ALLOYS

Optional Information

Notes
(c) 2012 American Institute of Physics