April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
EL07.13.02

Field Sensitive Ba1-xSrxTi0.89Hf0.11O3 Ceramics with Super High Dielectric Tunability

When and Where

Apr 26, 2024
1:45pm - 2:00pm
Room 342, Level 3, Summit

Presenter(s)

Co-Author(s)

Wanting Hu1,Haixue Yan1,Xuyao Tang1,Samrawit Hailu1,Isaac Abrahams1

Queen Mary University of London1

Abstract

Wanting Hu1,Haixue Yan1,Xuyao Tang1,Samrawit Hailu1,Isaac Abrahams1

Queen Mary University of London1
Barium strontium titanate(Ba<sub>1-x</sub>Sr<sub>x</sub>TiO<sub>3</sub>, BST) is a promising candidate for tunable components but the turnability of BST is relatively low and the mechanisms of turnability and the impact of electric fields on the dielectric properties of BST ceramics require more comprehensive research. Here, by introducing Hf and adjusting the content of Sr, the transition in BST ceramics turn to the diffuse phase There are at least two distinct polar structures, which is suggested by different current peaks in current-electric field loops. The developed ceramics show super high dielectric tunability (up to 68%) which can be attributed the different polar structures having significantly sensitive to applied electric fields. Compared to pure BST ceramics or other doped variants, the designed BST exhibit nearly twice the increase in dielectric tunability and hold great potential for widespread use in tunable devices including phase shifters, resonators, filters, voltage-controlled oscillator.

Keywords

dielectric properties | Hf

Symposium Organizers

John Heron, University of Michigan
Morgan Trassin, ETH Zurich
Ruijuan Xu, North Carolina State University
Di Yi, Tsinghua University

Symposium Support

Gold
ADNANOTEK CORP.

Bronze
Arrayed Materials (China) Co., Ltd.
NBM Design, Inc.

Session Chairs

Kevin Crust
Aileen Luo

In this Session