Detail publikace

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.

Originální název

Thermal annealing effects in polycrystalline EuTiO3 and Eu2Ti2O7

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

MAGNETIC-PROPERTIES; GRADIENT; CRYSTAL; TDPAC; PURE

Autoři

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

Vydáno

1. 12. 2019

Nakladatel

AIP Publishing

Místo

MELVILLE

ISSN

2158-3226

Periodikum

AIP Advances

Ročník

9

Číslo

12

Stát

Spojené státy americké

Strany od

1

Strany do

7

Strany počet

7

URL

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

Plný text v Digitální knihovně

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"
}