Role of magnetic exchange energy on charge ordering in R 1/3Sr 2/3FeO 3 (R=La,Pr,andNd)

J. Ma; J. Q. Yan; S. O. Diallo; R. Stevens; A. Llobet; F. Trouw; D. L. Abernathy; M. B. Stone; R. J. McQueeney

doi:10.1103/PhysRevB.84.224115

Role of magnetic exchange energy on charge ordering in R _1/3Sr _2/3FeO ₃ (R=La,Pr,andNd)

J. Ma, J. Q. Yan, S. O. Diallo, R. Stevens, A. Llobet, F. Trouw, D. L. Abernathy, M. B. Stone, R. J. McQueeney

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Abstract

Inelastic neutron scattering is applied to study the role of magnetism in stabilizing the charge-ordered state in R _1/3Sr _2/3FeO ₃ (RSFO) (R=La,Pr,andNd). The ratio of the ferromagnetic exchange energy J _F and antiferromagnetic exchange energy J _AF, J _F/J _AF, is a key indicator of the stability of the charge-ordered and antiferromagnetic ordered state. This ratio is obtained from the spin-wave spectrum by inelastic neutron scattering and is sufficiently large to suggest that the magnetic exchange energy alone can stabilize the charge-ordered state in La _1/3Sr _2/3FeO ₃ and Pr _1/3Sr _2/3FeO ₃. The exchange ratio decreases from La _1/3Sr _2/3FeO ₃ to Nd _1/3Sr _2/3FeO ₃, which indicates a gradual destabilization of the magnetic exchange mechanism for charge ordering in correspondence with the observed reduction in the ordering temperature.

Original language	English
Article number	224115
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.84.224115
State	Published - Dec 22 2011

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title = "Role of magnetic exchange energy on charge ordering in R 1/3Sr 2/3FeO 3 (R=La,Pr,andNd)",

abstract = "Inelastic neutron scattering is applied to study the role of magnetism in stabilizing the charge-ordered state in R 1/3Sr 2/3FeO 3 (RSFO) (R=La,Pr,andNd). The ratio of the ferromagnetic exchange energy J F and antiferromagnetic exchange energy J AF, J F/J AF, is a key indicator of the stability of the charge-ordered and antiferromagnetic ordered state. This ratio is obtained from the spin-wave spectrum by inelastic neutron scattering and is sufficiently large to suggest that the magnetic exchange energy alone can stabilize the charge-ordered state in La 1/3Sr 2/3FeO 3 and Pr 1/3Sr 2/3FeO 3. The exchange ratio decreases from La 1/3Sr 2/3FeO 3 to Nd 1/3Sr 2/3FeO 3, which indicates a gradual destabilization of the magnetic exchange mechanism for charge ordering in correspondence with the observed reduction in the ordering temperature.",

author = "J. Ma and Yan, {J. Q.} and Diallo, {S. O.} and R. Stevens and A. Llobet and F. Trouw and Abernathy, {D. L.} and Stone, {M. B.} and McQueeney, {R. J.}",

year = "2011",

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doi = "10.1103/PhysRevB.84.224115",

language = "English",

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T1 - Role of magnetic exchange energy on charge ordering in R 1/3Sr 2/3FeO 3 (R=La,Pr,andNd)

AU - Ma, J.

AU - Yan, J. Q.

AU - Diallo, S. O.

AU - Stevens, R.

AU - Llobet, A.

AU - Trouw, F.

AU - Abernathy, D. L.

AU - Stone, M. B.

AU - McQueeney, R. J.

PY - 2011/12/22

Y1 - 2011/12/22

N2 - Inelastic neutron scattering is applied to study the role of magnetism in stabilizing the charge-ordered state in R 1/3Sr 2/3FeO 3 (RSFO) (R=La,Pr,andNd). The ratio of the ferromagnetic exchange energy J F and antiferromagnetic exchange energy J AF, J F/J AF, is a key indicator of the stability of the charge-ordered and antiferromagnetic ordered state. This ratio is obtained from the spin-wave spectrum by inelastic neutron scattering and is sufficiently large to suggest that the magnetic exchange energy alone can stabilize the charge-ordered state in La 1/3Sr 2/3FeO 3 and Pr 1/3Sr 2/3FeO 3. The exchange ratio decreases from La 1/3Sr 2/3FeO 3 to Nd 1/3Sr 2/3FeO 3, which indicates a gradual destabilization of the magnetic exchange mechanism for charge ordering in correspondence with the observed reduction in the ordering temperature.

AB - Inelastic neutron scattering is applied to study the role of magnetism in stabilizing the charge-ordered state in R 1/3Sr 2/3FeO 3 (RSFO) (R=La,Pr,andNd). The ratio of the ferromagnetic exchange energy J F and antiferromagnetic exchange energy J AF, J F/J AF, is a key indicator of the stability of the charge-ordered and antiferromagnetic ordered state. This ratio is obtained from the spin-wave spectrum by inelastic neutron scattering and is sufficiently large to suggest that the magnetic exchange energy alone can stabilize the charge-ordered state in La 1/3Sr 2/3FeO 3 and Pr 1/3Sr 2/3FeO 3. The exchange ratio decreases from La 1/3Sr 2/3FeO 3 to Nd 1/3Sr 2/3FeO 3, which indicates a gradual destabilization of the magnetic exchange mechanism for charge ordering in correspondence with the observed reduction in the ordering temperature.

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Role of magnetic exchange energy on charge ordering in R _1/3Sr _2/3FeO ₃ (R=La,Pr,andNd)

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