Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet
We report on the positive magnetoresistance (MR) that accompanies the onset of fan-type magnetic structures in an epitaxially grown Dy/Y superlattice (SL). We find that MR ratios for current perpendicular to plane (CPP) and in-plane (CIP) geometries yield comparable values and a similar nonmonotonic...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2013
|
| _version_ | 1797067809926152192 |
|---|---|
| author | Benito, L Ward, R Blamire, MG |
| author_facet | Benito, L Ward, R Blamire, MG |
| author_sort | Benito, L |
| collection | OXFORD |
| description | We report on the positive magnetoresistance (MR) that accompanies the onset of fan-type magnetic structures in an epitaxially grown Dy/Y superlattice (SL). We find that MR ratios for current perpendicular to plane (CPP) and in-plane (CIP) geometries yield comparable values and a similar nonmonotonic dependence on the applied magnetic field H and temperature, which result in a maximum MR∼0.45% at T=110 K. We demonstrate that the rise in resistance is due to the increase in the number of superzone band gaps that accompanies the magnetization process of the anisotropic spin-spiral magnet, which reflects on the increasing complexity of the field-induced modulated magnetic structures. Furthermore, we find that the suppression of the giant MR in Dy/Y SL is due mainly to the combined action of chemical modulation and epitaxial strain effects. Finally, MR presents a linear (negative slope) and unsaturated scaling with H in the magnetized state, which is a clear fingerprint of magnon MR in highly anisotropic magnetic materials. © 2013 American Physical Society. |
| first_indexed | 2024-03-06T22:01:41Z |
| format | Journal article |
| id | oxford-uuid:4ecfe375-22fd-42d4-8bce-976b49060d91 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:01:41Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:4ecfe375-22fd-42d4-8bce-976b49060d912022-03-26T16:03:22ZPositive magnetoresistance induced by fan-type phases in a spin-spiral magnetJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4ecfe375-22fd-42d4-8bce-976b49060d91EnglishSymplectic Elements at Oxford2013Benito, LWard, RBlamire, MGWe report on the positive magnetoresistance (MR) that accompanies the onset of fan-type magnetic structures in an epitaxially grown Dy/Y superlattice (SL). We find that MR ratios for current perpendicular to plane (CPP) and in-plane (CIP) geometries yield comparable values and a similar nonmonotonic dependence on the applied magnetic field H and temperature, which result in a maximum MR∼0.45% at T=110 K. We demonstrate that the rise in resistance is due to the increase in the number of superzone band gaps that accompanies the magnetization process of the anisotropic spin-spiral magnet, which reflects on the increasing complexity of the field-induced modulated magnetic structures. Furthermore, we find that the suppression of the giant MR in Dy/Y SL is due mainly to the combined action of chemical modulation and epitaxial strain effects. Finally, MR presents a linear (negative slope) and unsaturated scaling with H in the magnetized state, which is a clear fingerprint of magnon MR in highly anisotropic magnetic materials. © 2013 American Physical Society. |
| spellingShingle | Benito, L Ward, R Blamire, MG Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title | Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title_full | Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title_fullStr | Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title_full_unstemmed | Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title_short | Positive magnetoresistance induced by fan-type phases in a spin-spiral magnet |
| title_sort | positive magnetoresistance induced by fan type phases in a spin spiral magnet |
| work_keys_str_mv | AT benitol positivemagnetoresistanceinducedbyfantypephasesinaspinspiralmagnet AT wardr positivemagnetoresistanceinducedbyfantypephasesinaspinspiralmagnet AT blamiremg positivemagnetoresistanceinducedbyfantypephasesinaspinspiralmagnet |