Tipping the magnetic instability in paramagnetic S r3 R u2 O7 by Fe impurities

M. Zhu; Y. Wang; P. G. Li; J. J. Ge; W. Tian; D. Keavney; Z. Q. Mao; X. Ke

doi:10.1103/PhysRevB.95.174430

Tipping the magnetic instability in paramagnetic S r3 R u2 O7 by Fe impurities

M. Zhu, Y. Wang, P. G. Li, J. J. Ge, W. Tian, D. Keavney, Z. Q. Mao, X. Ke

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Abstract

We report the magnetic and electronic properties of the bilayer ruthenate Sr3Ru2O7 upon Fe substitution for Ru. We find that Sr3(Ru1-xFex)2O7 shows a spin-glass-like phase below 4 K for x=0.01 and commensurate E-type antiferromagnetically ordered insulating ground state characterized by the propagation vector qc=(0.250.250) for x≥0.03, respectively, in contrast to the paramagnetic metallic state in the parent compound with strong spin fluctuations occurring at wave vectors q=(0.0900) and (0.25 0 0). The observed antiferromagnetic ordering is quasi-two-dimensional with very short correlation length along the c axis, a feature similar to the Mn-doped Sr3Ru2O7. Our results suggest that this ordered ground state is associated with the intrinsic magnetic instability in the pristine compound, which can be readily tipped by the local magnetic coupling between the 3d orbitals of the magnetic dopants and Ru 4d orbitals.

Original language	English
Article number	174430
Journal	Physical Review B
Volume	95
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.95.174430
State	Published - May 19 2017

Funding

Work at Michigan State University was supported by the National Science Foundation under Award No. DMR-1608752 and the start-up funds from Michigan State University. Work at Tulane University was supported by the U.S. Department of Energy (DOE) under EPSCOR Grant No. DE-SC0012432 with additional support from the Louisiana Board of Regents (support for crystal growth). Work at ORNL's HFIR was supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, DOE. This research used resources of the Advanced Photon Source, a U.S. Department of Energy Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.

Funders	Funder number
Scientific User Facilities Division
National Science Foundation	DMR-1608752
U.S. Department of Energy	DE-SC0012432
Office of Science
Basic Energy Sciences
Argonne National Laboratory	DE-AC02-06CH11357
Louisiana Board of Regents
Michigan State University

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title = "Tipping the magnetic instability in paramagnetic S r3 R u2 O7 by Fe impurities",

abstract = "We report the magnetic and electronic properties of the bilayer ruthenate Sr3Ru2O7 upon Fe substitution for Ru. We find that Sr3(Ru1-xFex)2O7 shows a spin-glass-like phase below 4 K for x=0.01 and commensurate E-type antiferromagnetically ordered insulating ground state characterized by the propagation vector qc=(0.250.250) for x≥0.03, respectively, in contrast to the paramagnetic metallic state in the parent compound with strong spin fluctuations occurring at wave vectors q=(0.0900) and (0.25 0 0). The observed antiferromagnetic ordering is quasi-two-dimensional with very short correlation length along the c axis, a feature similar to the Mn-doped Sr3Ru2O7. Our results suggest that this ordered ground state is associated with the intrinsic magnetic instability in the pristine compound, which can be readily tipped by the local magnetic coupling between the 3d orbitals of the magnetic dopants and Ru 4d orbitals.",

author = "M. Zhu and Y. Wang and Li, {P. G.} and Ge, {J. J.} and W. Tian and D. Keavney and Mao, {Z. Q.} and X. Ke",

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AU - Zhu, M.

AU - Wang, Y.

AU - Li, P. G.

AU - Ge, J. J.

AU - Tian, W.

AU - Keavney, D.

AU - Mao, Z. Q.

AU - Ke, X.

PY - 2017/5/19

Y1 - 2017/5/19

N2 - We report the magnetic and electronic properties of the bilayer ruthenate Sr3Ru2O7 upon Fe substitution for Ru. We find that Sr3(Ru1-xFex)2O7 shows a spin-glass-like phase below 4 K for x=0.01 and commensurate E-type antiferromagnetically ordered insulating ground state characterized by the propagation vector qc=(0.250.250) for x≥0.03, respectively, in contrast to the paramagnetic metallic state in the parent compound with strong spin fluctuations occurring at wave vectors q=(0.0900) and (0.25 0 0). The observed antiferromagnetic ordering is quasi-two-dimensional with very short correlation length along the c axis, a feature similar to the Mn-doped Sr3Ru2O7. Our results suggest that this ordered ground state is associated with the intrinsic magnetic instability in the pristine compound, which can be readily tipped by the local magnetic coupling between the 3d orbitals of the magnetic dopants and Ru 4d orbitals.

AB - We report the magnetic and electronic properties of the bilayer ruthenate Sr3Ru2O7 upon Fe substitution for Ru. We find that Sr3(Ru1-xFex)2O7 shows a spin-glass-like phase below 4 K for x=0.01 and commensurate E-type antiferromagnetically ordered insulating ground state characterized by the propagation vector qc=(0.250.250) for x≥0.03, respectively, in contrast to the paramagnetic metallic state in the parent compound with strong spin fluctuations occurring at wave vectors q=(0.0900) and (0.25 0 0). The observed antiferromagnetic ordering is quasi-two-dimensional with very short correlation length along the c axis, a feature similar to the Mn-doped Sr3Ru2O7. Our results suggest that this ordered ground state is associated with the intrinsic magnetic instability in the pristine compound, which can be readily tipped by the local magnetic coupling between the 3d orbitals of the magnetic dopants and Ru 4d orbitals.

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Tipping the magnetic instability in paramagnetic S r3 R u2 O7 by Fe impurities

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