Room temperature biaxial magnetic anisotropy in La 0.67 Sr 0.33 MnO 3 thin films on SrTiO 3 buffered MgO (001) substrates for spintronic applications - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2018

Room temperature biaxial magnetic anisotropy in La 0.67 Sr 0.33 MnO 3 thin films on SrTiO 3 buffered MgO (001) substrates for spintronic applications

Résumé

Spintronics exploits the magnetoresistance effects to store or sense the magnetic information. Since the magnetoresistance strictly depends on the magnetic anisotropy of a system, it is fundamental to set a defined anisotropy to the system. Here, we investigate half-metallic La0.67Sr0.33MnO3 thin films by means of vectorial Magneto-Optical Kerr Magnetometry and found that they exhibit pure biaxial magnetic anisotropy at room temperature if grown onto a MgO (001) substrate with a thin SrTiO3 buffer. In this way, we can avoid unwanted uniaxial magnetic anisotropy contributions that may be detrimental for specific applications. The detailed study of the angular evolution of the magnetization reversal pathways and critical fields (coercivity and switching) discloses the origin of the magnetic anisotropy, which is magnetocrystalline in nature and shows fourfold symmetry at any temperature.
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Dates et versions

hal-01924008 , version 1 (15-11-2018)

Identifiants

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Sandeep Kumar Chaluvadi, Fernando Ajejas, Pasquale Orgiani, Olivier Rousseau, Giovanni Vinai, et al.. Room temperature biaxial magnetic anisotropy in La 0.67 Sr 0.33 MnO 3 thin films on SrTiO 3 buffered MgO (001) substrates for spintronic applications. Applied Physics Letters, 2018, 113, pp.052403. ⟨10.1063/1.5020072⟩. ⟨hal-01924008⟩
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