Temperature dependent anomalous Hall effect and anomalous Nernst effect in perpendicularly magnetized [CoSiB/Pt] multilayer film

• Published in: Journal of magnetism and magnetic materials Vol. 446; pp. 264 - 269
• Main Authors: Gautam, Praveen, Sharma, Pradeep Raj, Kim, Y.K., Kim, T.W., Noh, Hwayong
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.01.2018; Elsevier BV
• Subjects: Anisotropy; Anomalous Hall; Anomalous Nernst; Coercivity; Effects; Ferromagnetic film; Hall effect; Low temperature resistance; Magnetic anisotropy; MOTT relation; Multilayered thin films; Nernst-Ettingshausen effect; Perpendicular magnetic anisotropy; Temperature; Temperature dependence; Anomalous Nernst; Ferromagnetic film; MOTT relation; Perpendicular magnetic anisotropy; Anomalous Hall
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2017.08.044

•Anomalous Hall and anomalous Nernst effects are measured in [CoSiB/Pt] films.•Temperature dependences of the two effects show clear distinction.•Sharp decrease of Nernst effect can be understood from Mott relation. We report experiments on the temperature dependence of anomalous Hall and anomalous Nernst effects in amorphous [CoSiB/Pt] multilayer films with perpendicular magnetic anisotropy down to low temperatures. The Hall resistance decreases slowly with decrease in temperature, remaining at about 88% of the room temperature value at 25K. On the other hand, the Nernst coefficient decreases rapidly with decreasing temperature and becomes about 10% of the room temperature value even at 100K. The coercive field determined from these measurements also shows a strong change with temperature, increasing by a factor of two at 25K as compared with that at room temperature.