Crystal structure and partial Ising-like magnetic ordering of orthorhombic
The structure and magnetic properties of orthorhombic Dy 2TiO 5 have been investigated using x-ray diffraction, neutron diffraction, and alternating current (ac)/direct current (dc) magnetic susceptibility measurements. In this paper, we report a continuous structural distortion below 100 K characterized by negative thermal expansion in the [0 1 0] direction. Neutron diffraction and magnetic susceptibility measurements revealed that two-dimensional (2D) magnetic ordering begins at 3.1 K, which is followed by a three-dimensional magnetic transition at 1.7 K. The magnetic structure has been solved through a representational analysis approach and can be indexed with the propagation vector k = [0 1/2 0]. The spin structure corresponds to a coplanar model of interwoven 2D “sheets” extending in the [0 1 0] direction. The local crystal field is different for each Dy 3+ ion (Dy1 and Dy2), one of which possesses strong uniaxial symmetry indicative of Ising-like magnetic ordering. In conclusion, consequently, two succeeding transitions under magnetic field are observed in the ac susceptibility, which are associated with flipping each Dy 3+ spin independently.
- Authors:
-
[1];
[2];
[3];
[4];
[5];
[6];
[3];
[7]
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering. Dept. of Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
- Florida State Univ., Tallahassee, FL (United States). Dept. of Physics. National High Magnet Field Lab.
- Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division. Spallation Neutron Source
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering
- Publication Date:
- Grant/Contract Number:
- AC05-00OR22725; SC0001089; DMR-1350002; DMR-1157490
- Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 2; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Research Org:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Florida State Univ., Tallahassee, FL (United States)
- Sponsoring Org:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Univ. of Tennessee (United States); National Science Foundation (NSF); State of Florida (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
- OSTI Identifier:
- 1346627
- Alternate Identifier(s):
- OSTI ID: 1261704