Structural and magnetic phase transitions in EuTi1-xNbxO3
- Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Here, we investigate the structural and magnetic phase transitions in EuTi1-xNbxO3 (0≤x≤0.3) with synchrotron powder x-ray diffraction, resonant ultrasound spectroscopy, and magnetization measurements. Upon Nb doping, the Pm$$\bar{3}$$m ↔ I4/mcm structural transition shifts to higher temperatures and the room temperature lattice parameter increases while the magnitude of the octahedral tilting decreases. In addition, Nb substitution for Ti destabilizes the antiferromagnetic ground state of the parent compound and long-range ferromagnetic order is observed in the samples with x≥0.1. Moreover, the structural transition in pure and doped compounds is marked by a dramatic step-like softening of the elastic moduli near TS, which resembles that of SrTiO3 and can be adequately modeled using the Landau free energy model employing the same coupling between strain and octahedral tilting order parameter as previously used to model SrTiO3.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; AC02-06CH11357
- OSTI ID:
- 1265813
- Alternate ID(s):
- OSTI ID: 1206797
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 2; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Giant low-field magnetocaloric effect in single-crystalline EuTi 0.85 Nb 0.15 O 3
|
journal | February 2016 |
Colossal magnetoresistance in low-doped EuTi 1− x Nb x O 3 ( x = 0.003 and 0.005)
|
journal | January 2019 |
Temperature dependent transport spin-polarization in the low Curie temperature complex itinerant ferromagnet EuTi 1− x Nb x O 3
|
journal | July 2019 |
Pressure-mediated structural transitions in bulk
|
journal | August 2018 |
Large low-field magnetic refrigeration in ferromagnetic insulator
|
journal | June 2018 |
Similar Records
Research Update: Magnetic phase diagram of EuTi{sub 1−x}B{sub x}O{sub 3} (B = Zr, Nb)
Temperature and composition dependent structural investigation of the defect perovskite series Sr{sub 1-x}Ti{sub 1-2x}Nb{sub 2x}O{sub 3}, 0{<=}x{<=}0.2