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Title: Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution

Authors:
; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1181091
Grant/Contract Number:
FG02-08ER46528
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 90; Journal Issue: 6; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Yiu, Yuen, Bonfà, Pietro, Sanna, Samuele, De Renzi, Roberto, Carretta, Pietro, McGuire, Michael A., Huq, Ashfia, and Nagler, Stephen E.. Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.90.064515.
Yiu, Yuen, Bonfà, Pietro, Sanna, Samuele, De Renzi, Roberto, Carretta, Pietro, McGuire, Michael A., Huq, Ashfia, & Nagler, Stephen E.. Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution. United States. doi:10.1103/PhysRevB.90.064515.
Yiu, Yuen, Bonfà, Pietro, Sanna, Samuele, De Renzi, Roberto, Carretta, Pietro, McGuire, Michael A., Huq, Ashfia, and Nagler, Stephen E.. Mon . "Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution". United States. doi:10.1103/PhysRevB.90.064515.
@article{osti_1181091,
title = {Tuning the magnetic and structural phase transitions of PrFeAsO via Fe/Ru spin dilution},
author = {Yiu, Yuen and Bonfà, Pietro and Sanna, Samuele and De Renzi, Roberto and Carretta, Pietro and McGuire, Michael A. and Huq, Ashfia and Nagler, Stephen E.},
abstractNote = {},
doi = {10.1103/PhysRevB.90.064515},
journal = {Physical Review B},
number = 6,
volume = 90,
place = {United States},
year = {Mon Aug 25 00:00:00 EDT 2014},
month = {Mon Aug 25 00:00:00 EDT 2014}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.90.064515

Citation Metrics:
Cited by: 5works
Citation information provided by
Web of Science

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  • Neutron diffraction and muon spin relaxation measurements are used to obtain a detailed phase diagram of PrFe1{xRuxAsO. The isoelectronic substitution of Ru for Fe acts eectively as spin dilution, suppressing both the structural and magnetic phase transitions. The temperature, TS, of the tetragonal-orthorhombic structural phase transition decreases gradually as a function of x. Slightly below TS coherent precessions of the muon spin are observed corresponding to static magnetism, possibly re ecting a signicant magneto-elastic coupling in the FeAs layers. Short range order in both the Fe and Pr moments persists for higher levels of x. The static magnetic moments disappearmore » at a concentration coincident with that expected for percolation of the J1 - J2 square lattice model.« less
  • We present results of transport and magnetic properties and heat capacity measurements on polycrystalline CeFeAsO, PrFeAsO and NdFeAsO. These materials undergo structural phase transitions, spin density wave-like magnetic ordering of small moments on iron and antiferromagnetic ordering of rare-earth moments. The temperature dependence of the electrical resistivity, Seebeck coefficient, thermal conductivity, Hall coefficient and magnetoresistance are reported. The magnetic behavior of the materials have been investigated using Moessbauer spectroscopy and magnetization measurements. Transport and magnetic properties are affected strongly by the structural and magnetic transitions, suggesting significant changes in the band structure and/or carrier mobilities occur, and phonon-phonon scattering ismore » reduced upon transformation to the low-temperature structure. Results are compared with recent reports for LaFeAsO, and systematic variations in properties as the identity of Ln is changed are observed and discussed. As Ln progresses across the rare-earth series from La to Nd, an increase in the hole contributions to the Seebeck coefficient and increases in magnetoresistance and the Hall coefficient are observed in the low-temperature phase. Analysis of hyperfine fields at the iron nuclei determined from Moessbauer spectra indicates that the moment on Fe in the orthorhombic phase is nearly independent of the identity of Ln, in apparent contrast to reports of powder neutron diffraction refinements.« less
  • Bilayer ruthenate Ca 3(Ru 1-xFe x) 2O 7 (x = 0.05) exhibits an incommensurate magnetic soliton lattice driven by the Dzyaloshinskii–Moriya interaction. Here, in this work, we report complex field-induced magnetic phase transitions and memory effect in this system via single-crystal neutron diffraction and magnetotransport measurements. We observe first-order incommensurate-to-commensurate magnetic transitions upon applying the magnetic field both along and perpendicular to the propagation axis of the incommensurate spin structure. Furthermore, we find that the metastable states formed upon decreasing the magnetic field depend on the temperature and the applied field orientation. Lastly, we suggest that the observed field-induced metastabilitymore » may be ascribable to the quenched kinetics at low temperature.« less
  • Cited by 3
  • We use powder neutron diffraction to study the spin and lattice structures of polycrystalline samples of nonsuperconducting PrFeAsO and superconducting PrFeAsO{sub 0.85}F{sub 0.15} and PrFeAsO{sub 0.85}. We find that PrFeAsO exhibits abrupt structural phase transitions at 153 K followed by static long-range antiferromagnetic order at 127 K. Both the structural distortion and magnetic order are similar to other rare-earth oxypnictides. Electron doping the system with either fluorine or oxygen deficiency suppresses the structural distortion and static long-range antiferromagnetic order, therefore placing these materials into the same class of FeAs-based superconductors.