DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr 0.5 Ca 0.5 MnO 3

Abstract

We have used time-of-flight inelastic neutron scattering to measure the spin wave spectrum of the canonical half-doped manganite Pr0.5Ca0.5MnO3 in its magnetic and orbitally ordered phase. Comparison of the data, which cover multiple Brillouin zones and the entire energy range of the excitations, with several different models shows that only the CE-type ordered state provides an adequate description of the magnetic ground state, provided interactions beyond nearest neighbor are included. We are able to rule out a ground state in which there exist pairs of dimerized spins which interact only with their nearest neighbors. The Zener polaron ground state, which comprises strongly bound magnetic dimers, can be ruled out on the basis of gross features of the observed spin wave spectrum. A model with weaker dimerization reproduces the observed dispersion but can be ruled out on the basis of subtle discrepancies between the calculated and observed structure factors at certain positions in reciprocal space. Adding further neighbor interactions results in almost no dimerization, i.e. interpolating back to the CE model. These results are consistent with theoretical analysis of the degenerate double exchange model for half-doping.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab., ISIS Neutron Source
  2. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab., ISIS Neutron Source; London Centre for Nanotechnology, London (United Kingdom)
  3. Univ. of Bristol, Bristol (United Kingdom). H. H. Wills Physics Lab.
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
  5. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan). Electronics and Photonics Research Inst.
  6. Univ. of Tokyo (Japan). Dept. of Applied Physics
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Engineering and Physical Sciences Research Council (EPSRC); Polish National Science Center (NCN)
OSTI Identifier:
1295094
Alternate Identifier(s):
OSTI ID: 1260441
Grant/Contract Number:  
AC05-00OR22725; 2012/04/A/ST3/00331; EP/G0314060/1
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Ewings, R. A., Perring, T. G., Sikora, O., Abernathy, D. L., Tomioka, Y., and Tokura, Y.. Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr0.5Ca0.5MnO3. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.014405.
Ewings, R. A., Perring, T. G., Sikora, O., Abernathy, D. L., Tomioka, Y., & Tokura, Y.. Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr0.5Ca0.5MnO3. United States. https://doi.org/10.1103/PhysRevB.94.014405
Ewings, R. A., Perring, T. G., Sikora, O., Abernathy, D. L., Tomioka, Y., and Tokura, Y.. Wed . "Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr0.5Ca0.5MnO3". United States. https://doi.org/10.1103/PhysRevB.94.014405. https://www.osti.gov/servlets/purl/1295094.
@article{osti_1295094,
title = {Spin excitations used to probe the nature of exchange coupling in the magnetically ordered ground state of Pr0.5Ca0.5MnO3},
author = {Ewings, R. A. and Perring, T. G. and Sikora, O. and Abernathy, D. L. and Tomioka, Y. and Tokura, Y.},
abstractNote = {We have used time-of-flight inelastic neutron scattering to measure the spin wave spectrum of the canonical half-doped manganite Pr0.5Ca0.5MnO3 in its magnetic and orbitally ordered phase. Comparison of the data, which cover multiple Brillouin zones and the entire energy range of the excitations, with several different models shows that only the CE-type ordered state provides an adequate description of the magnetic ground state, provided interactions beyond nearest neighbor are included. We are able to rule out a ground state in which there exist pairs of dimerized spins which interact only with their nearest neighbors. The Zener polaron ground state, which comprises strongly bound magnetic dimers, can be ruled out on the basis of gross features of the observed spin wave spectrum. A model with weaker dimerization reproduces the observed dispersion but can be ruled out on the basis of subtle discrepancies between the calculated and observed structure factors at certain positions in reciprocal space. Adding further neighbor interactions results in almost no dimerization, i.e. interpolating back to the CE model. These results are consistent with theoretical analysis of the degenerate double exchange model for half-doping.},
doi = {10.1103/PhysRevB.94.014405},
journal = {Physical Review B},
number = 1,
volume = 94,
place = {United States},
year = {Wed Jul 06 00:00:00 EDT 2016},
month = {Wed Jul 06 00:00:00 EDT 2016}
}

Journal Article:

Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Magnons in the half-doped manganites
journal, July 2003


Bond- versus site-centred ordering and possible ferroelectricity in manganites
journal, November 2004

  • Efremov, Dmitry V.; van den Brink, Jeroen; Khomskii, Daniel I.
  • Nature Materials, Vol. 3, Issue 12
  • DOI: 10.1038/nmat1236

Resonant x-ray diffraction of the magnetoresistant perovskite Pr 0.6 Ca 0.4 MnO 3
journal, April 2004


Electronic ferroelectricity induced by charge and orbital orderings
journal, February 2014


Experimental confirmation of Zener-polaron-type charge and orbital ordering in Pr 1 x Ca x MnO 3
journal, November 2007


Spin waves and magnetic exchange interactions in CaFe2As2
journal, July 2009

  • Zhao, Jun; Adroja, D. T.; Yao, Dao-Xin
  • Nature Physics, Vol. 5, Issue 8
  • DOI: 10.1038/nphys1336

Polaron melting and ordering as key mechanisms for colossal resistance effects in manganites
journal, August 2007

  • Jooss, Ch.; Wu, L.; Beetz, T.
  • Proceedings of the National Academy of Sciences, Vol. 104, Issue 34
  • DOI: 10.1073/pnas.0702748104

Charge and Magnetic Order in L a 0.5 S r 1.5 Mn O 4
journal, March 1996


Anisotropic spin waves and exchange interactions in the A -type antiferromagnetic state of Pr 0.5 Sr 0.5 Mn O 3
journal, February 2006


Spin-Wave Dispersion in Orbitally Ordered La 1 / 2 Sr 3 / 2 MnO 4
journal, June 2006


Theory of anomalous magnon softening in ferromagnetic manganites
journal, February 2000


Interpreting magnetic X-ray scattering on Gd-compounds using the McPhase simulation program
journal, March 2004


Lattice effects in magnetoresistive manganese perovskites
journal, March 1998


Evolution of Spin-Wave Excitations in Ferromagnetic Metallic Manganites
journal, January 2006


Ordered Phases and Magnetic Excitations in Doped Manganites
journal, November 2004


Magnons in ferromagnetic metallic manganites
journal, July 2007


Charge ordering in half-doped manganites
journal, October 2004


Doping dependence of the exchange energies in bilayer manganites: Role of orbital degrees of freedom
journal, May 2002


Spin-wave expansion, finite temperature corrections, and order from disorder effects in the double exchange model
journal, February 2002


Spin Waves in the ( π , 0 ) Magnetically Ordered Iron Chalcogenide Fe 1.05 Te
journal, February 2011


Analysis of the x-ray resonant scattering at the Mn K edge in half-doped mixed valence manganites
journal, March 2001

  • García, Joaquín; Sánchez, M. Concepción; Blasco, Javier
  • Journal of Physics: Condensed Matter, Vol. 13, Issue 14
  • DOI: 10.1088/0953-8984/13/14/302

Superexchange interaction and symmetry properties of electron orbitals
journal, July 1959


Spin dynamical properties and orbital states of the layered perovskite La 2 2 x Sr 1 + 2 x Mn 2 O 7 ( 0.3 <~ x < 0.5 )
journal, January 2002


Multiferroicity and orbital ordering in Pr 0.5 Ca 0.5 MnO 3 from first principles
journal, October 2010

  • Colizzi, Giuseppe; Filippetti, Alessio; Fiorentini, Vincenzo
  • Physical Review B, Vol. 82, Issue 14
  • DOI: 10.1103/PhysRevB.82.140101

Charge and Orbital Order in Half-Doped Manganites
journal, December 1999

  • van den Brink, Jeroen; Khaliullin, Giniyat; Khomskii, Daniel
  • Physical Review Letters, Vol. 83, Issue 24
  • DOI: 10.1103/PhysRevLett.83.5118

Critical features of colossal magnetoresistive manganites
journal, February 2006


Softening and Broadening of the Zone Boundary Magnons in Pr 0.63 Sr 0.37 MnO 3
journal, February 1998


Magnetic-field-induced metal-insulator phenomena in Pr 1 x Ca x Mn O 3 with controlled charge-ordering instability
journal, January 1996


Magnetism and charge ordering in Pr 0.5 Ca x Sr 0.5 x MnO 3 ( x = 0.09 and 0 . 5 )
journal, January 2000


Phase Separation Scenario for Manganese Oxides and Related Materials
journal, March 1999


Orbital ordering and unfrustrated ( π , 0 ) magnetism from degenerate double exchange in the iron pnictides
journal, July 2010


Magnetic control of ferroelectric polarization
journal, November 2003


Charge, orbital, and magnetic ordering in La 0.5 Ca 0.5 MnO 3 s
journal, February 1997


Complexity in Strongly Correlated Electronic Systems
journal, July 2005


Structural origin of dipole x-ray resonant scattering in the low-temperature phase of Nd 0.5 Sr 0.5 MnO 3
journal, July 2004


Magnetically Induced Electronic Ferroelectricity in Half-Doped Manganites
journal, July 2009


Quantum spin dynamics of the bilayer ferromagnet La $ \mathsf {_{1.2}}$ Sr $ \mathsf {_{1.8}}$ Mn $ \mathsf {_2}$ O $ \mathsf {_7}$
journal, June 2002

  • Shannon, N.; Chatterji, T.; Ouchni, F.
  • The European Physical Journal B - Condensed Matter, Vol. 27, Issue 3
  • DOI: 10.1140/epjb/e2002-00157-2

Spectacular Doping Dependence of Interlayer Exchange and Other Results on Spin Waves in Bilayer Manganites
journal, October 2001


Design and operation of the wide angular-range chopper spectrometer ARCS at the Spallation Neutron Source
journal, January 2012

  • Abernathy, D. L.; Stone, M. B.; Loguillo, M. J.
  • Review of Scientific Instruments, Vol. 83, Issue 1
  • DOI: 10.1063/1.3680104

Zener Polaron Ordering in Half-Doped Manganites
journal, August 2002


Mechanism of Ferroelectricity in Half-Doped Manganites with Pseudocubic and Bilayer Structure
journal, November 2013

  • Yamauchi, Kunihiko; Picozzi, Silvia
  • Journal of the Physical Society of Japan, Vol. 82, Issue 11
  • DOI: 10.7566/JPSJ.82.113703

Oxygen Stripes in L a 0.5 C a 0.5 M n O 3 from Ab Initio Calculations
journal, November 2003


New Phase Transition in the Pr 1 x Ca x MnO 3 System: Evidence for Electrical Polarization in Charge Ordered Manganites
journal, April 2008


Structural and magnetic properties of the single-layer manganese oxide La 1 x Sr 1 + x MnO 4
journal, January 2005


Buckling-induced Zener polaron instability in half-doped manganites
journal, June 2011


Ground State in a Half-Doped Manganite Distinguished by Neutron Spectroscopy
journal, December 2012


Advances in the Physics of High-Temperature Superconductivity
journal, April 2000


Microstructure related to charge and orbital ordering in Pr 0.5 Ca 0.5 MnO 3
journal, June 1999


Zener versus de Gennes ferromagnetism in La 1 x Sr x MnO 3
journal, August 2000


Ferromagnetic polarons in La 0.5 Ca 0.5 MnO 3 and La 0.33 Ca 0.67 MnO 3
journal, June 2003


Direct experimental evidence of multiferroicity in a nanocrystalline Zener polaron ordered manganite
journal, December 2014


Orbital Physics in Transition-Metal Oxides
journal, April 2000


Theory of the Role of Covalence in the Perovskite-Type Manganites [ La ,   M ( II ) ] Mn O 3
journal, October 1955