Abstract
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.
Highlights
Sandeep Kumar Chaluvadi,1 Fernando Ajejas,2,3 Pasquale Orgiani,4,5 Olivier Rousseau,1 Giovanni Vinai,4 Aleksandr Yu Petrov,4 Piero Torelli,4 Alain Pautrat,6 Julio Camarero,2,3 Paolo Perna,2 and Laurence Mechin1,a)
Since the magnetoresistance strictly depends on the magnetic anisotropy of a system
avoid unwanted uniaxial magnetic anisotropy contributions that may be detrimental for specific applications
Summary
Sandeep Kumar Chaluvadi,1 Fernando Ajejas,2,3 Pasquale Orgiani,4,5 Olivier Rousseau,1 Giovanni Vinai,4 Aleksandr Yu Petrov,4 Piero Torelli,4 Alain Pautrat,6 Julio Camarero,2,3 Paolo Perna,2 and Laurence Mechin1,a).
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