Ground state in a half-doped manganite distinguished by neutron spectroscopy.
We have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)(2)Mn(2)O(7) in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations...
| Hauptverfasser: | , , , , |
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| Format: | Journal article |
| Sprache: | English |
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2012
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| _version_ | 1826304030863785984 |
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| author | Johnstone, G Perring, T Sikora, O Prabhakaran, D Boothroyd, A |
| author_facet | Johnstone, G Perring, T Sikora, O Prabhakaran, D Boothroyd, A |
| author_sort | Johnstone, G |
| collection | OXFORD |
| description | We have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)(2)Mn(2)O(7) in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations for different models of the electronic ground state. The data are described very well by the Goodenough model, which has weakly interacting ferromagnetic zig-zag chains in the CE-type arrangement. A model that allows ferromagnetic dimers to form within the zigzags is inconsistent with the data. The analysis conclusively rules out the strongly bound dimer (Zener polaron) model. |
| first_indexed | 2024-03-07T06:11:40Z |
| format | Journal article |
| id | oxford-uuid:efb8201c-edfc-4487-9d03-a15fafcaa218 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:11:40Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:efb8201c-edfc-4487-9d03-a15fafcaa2182022-03-27T11:42:17ZGround state in a half-doped manganite distinguished by neutron spectroscopy.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:efb8201c-edfc-4487-9d03-a15fafcaa218EnglishSymplectic Elements at Oxford2012Johnstone, GPerring, TSikora, OPrabhakaran, DBoothroyd, AWe have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)(2)Mn(2)O(7) in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations for different models of the electronic ground state. The data are described very well by the Goodenough model, which has weakly interacting ferromagnetic zig-zag chains in the CE-type arrangement. A model that allows ferromagnetic dimers to form within the zigzags is inconsistent with the data. The analysis conclusively rules out the strongly bound dimer (Zener polaron) model. |
| spellingShingle | Johnstone, G Perring, T Sikora, O Prabhakaran, D Boothroyd, A Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title | Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title_full | Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title_fullStr | Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title_full_unstemmed | Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title_short | Ground state in a half-doped manganite distinguished by neutron spectroscopy. |
| title_sort | ground state in a half doped manganite distinguished by neutron spectroscopy |
| work_keys_str_mv | AT johnstoneg groundstateinahalfdopedmanganitedistinguishedbyneutronspectroscopy AT perringt groundstateinahalfdopedmanganitedistinguishedbyneutronspectroscopy AT sikorao groundstateinahalfdopedmanganitedistinguishedbyneutronspectroscopy AT prabhakarand groundstateinahalfdopedmanganitedistinguishedbyneutronspectroscopy AT boothroyda groundstateinahalfdopedmanganitedistinguishedbyneutronspectroscopy |