Publication detail

Thermal annealing effects in polycrystalline EuTiO3 and Eu2Ti2O7

SCHELL, J. KAMBA, S. KACHLÍK, M. MACA, K. DRAHOKOUPIL, J. RANO, B. GONÇALVES, J. DANG, T. COSTA, A. NOLL, C. VIANDEN, R. LUPASCU, D.

Original Title

Thermal annealing effects in polycrystalline EuTiO3 and Eu2Ti2O7

Type

journal article in Web of Science

Language

English

Original Abstract

Using time-differential perturbed angular correlation of gamma rays, we investigated the electric-field gradient of polycrystalline EuTiO3 and Eu2Ti2O7, with Hf-181(Ta-181) as a probe, following different thermal treatments. The measurements were performed at ISOLDE-CERN following 80 keV implantation at the Bonn Radioisotope Separator. The experimental results indicated successful induction of different phases in the implantation recovery process at 1273 and 1373 K. These observations were combined with ab initio calculations and X-ray diffraction measurements. A comparison of ab initio calculated electric-field gradients with the measured values discriminates between different structures and defects and rules out many possible cases. The Ta probe at the Ti site in the Eu2Ti2O7 phase is found to be the most probable case of site occupation after annealing at 1373 K, while annealing at 1273 K keeps EuTiO3 in the vicinity of the Ta probe. A discussion of the hyperfine interactions that promote variation in the interaction strength at the Ta-181 site is presented.

Keywords

MAGNETIC-PROPERTIES; GRADIENT; CRYSTAL; TDPAC; PURE

Authors

SCHELL, J.; KAMBA, S.; KACHLÍK, M.; MACA, K.; DRAHOKOUPIL, J.; RANO, B.; GONÇALVES, J.; DANG, T.; COSTA, A.; NOLL, C.; VIANDEN, R.; LUPASCU, D.

Released

1. 12. 2019

Publisher

AIP Publishing

Location

MELVILLE

ISBN

2158-3226

Periodical

AIP Advances

Year of study

9

Number

12

State

United States of America

Pages from

1

Pages to

7

Pages count

7

URL

https://aip.scitation.org/doi/10.1063/1.5115466

Full text in the Digital Library

http://hdl.handle.net/11012/184685

BibTex

@article{BUT161367,
  author="Juliana {Schell} and Stanislav {Kamba} and Martin {Kachlík} and Karel {Maca} and Jan {Drahokoupil} and B. Rahman {Rano} and João Nuno Santos {Gonçalves} and Thien Thanh {Dang} and Angelo {Costa} and Cornelia {Noll} and Reiner {Vianden} and Doru C. {Lupascu}",
  title="Thermal annealing effects in polycrystalline EuTiO3 and Eu2Ti2O7",
  journal="AIP Advances",
  year="2019",
  volume="9",
  number="12",
  pages="1--7",
  doi="10.1063/1.5115466",
  issn="2158-3226",
  url="https://aip.scitation.org/doi/10.1063/1.5115466"
}