Role of magnetic exchange energy on charge ordering in R(1/3)Sr(2/3)FeO(3) (R = La, Pr, and Nd)
| Title | Role of magnetic exchange energy on charge ordering in R(1/3)Sr(2/3)FeO(3) (R = La, Pr, and Nd) |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Ma J, Yan JQ, Diallo SO, Stevens R, Llobet A, Trouw F, Abernathy DL, Stone MB, McQueeney RJ |
| Journal Title | Physical Review B |
| Volume | 84 |
| Pages | 224115 |
| Date Published | 12 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000298556000006 |
| Keywords | crystal-field levels, neutron-scattering, ORTHOFERRITES, oxides, spin, states, TRANSITIONS |
| Abstract | Inelastic neutron scattering is applied to study the role of magnetism in stabilizing the charge-ordered state in R(1/3)Sr(2/3)FeO(3) (RSFO) (R = La, Pr, and Nd). 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(1/3)Sr(2/3)FeO(3) and Pr(1/3)Sr(2/3)FeO(3). The exchange ratio decreases from La(1/3)Sr(2/3)FeO(3) to Nd(1/3)Sr(2/3)FeO(3), which indicates a gradual destabilization of the magnetic exchange mechanism for charge ordering in correspondence with the observed reduction in the ordering temperature. |
| DOI | 10.1103/PhysRevB.84.224115 |
| Alternate Journal | Phys. Rev. B |
