A Low-Field Temperature Dependent EPR Signal in Terraced MgO: Mn2+Nanoparticles: An Enhanced Zeeman Splitting in the Wide-Bandgap Oxide

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/473702.do
DOI
10.1155/2017/8276520
Title
A Low-Field Temperature Dependent EPR Signal in Terraced MgO: Mn2+Nanoparticles: An Enhanced Zeeman Splitting in the Wide-Bandgap Oxide
Description
This work was done by financial support from the Global Frontier Centerfor Multiscale Energy Systems (2011-0031561) supported by the KoreanMinistry of Science and Technology. The authors thank Korea Universityand Sunhee Kim from KBSI for the EPR measurements.
abstract
Mn2+ ion doping is used as an electron paramagnetic resonance (EPR) probe to investigate the influence of low-coordination structural defects such as step edges at the surface of terraced (001) MgO nanoparticles on the electronic properties. Beside the well-known hyperfine sextet of Mn2+ ions in the cubic crystal field of MgO, an additional EPR feature with a striking nonmonotonous temperature dependent shift of the g-factor is observed in terraced nanoparticles in the temperature range from 4K to room temperature. By linking the difference in the temperature dependence of the Mn2+ sextet intensity in cubic and terraced nanoparticles with the possible s-d exchange shift and enhanced Zeeman splitting we conclude that the novel EPR feature originates from the loosely trapped charge-compensating carriers at the abundant structural defects at the surface of terraced nanoparticles due to their exchange interaction with neighboring Mn2+ ions.
provenance
Made available in Cube on 2018-09-28T10:26:37Z (GMT). No. of bitstreams: 0
language
English
author
Pikhitsa, Peter V.
Chae, Sukbyung
Shin, Seungha
Choi, Andmansoo
accessioned
2018-09-28T10:26:37Z
available
2018-09-28T10:26:37Z
issued
2017
citation
JOURNAL OF SPECTROSCOPY
issn
2314-4920
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/473702.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345274022
Jurisdiction
Rep.of Korea
Project Name
BK21+ Transformative Training Program for Creative Mechanical and Aerospace Engineers
rights
openAccess
type
article


Files in This Item

There are no attached files.