Magnetic and magneto-optical properties of MnSb films on various substrates |
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| Institution: | 1. Department of Physics, National University of Singapore, 10 Lower Kent Ridge Crescent, Singapore 119260, Singapore;2. Data Storage Institute, National University of Singapore, 10 Lower Kent Ridge Crescent, Singapore 119260, Singapore;1. Young Researchers and Elites Club, Roodsar Branch, Islamic Azad University, Roodsar, Iran;2. Department of Industrial Chemistry, Fakhr Razi Institute of Higher Education, Saveh, Iran;1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;2. Key Laboratory of Space Applied Physics and Chemistry of the Ministry of Education, School of Science, Northwestern Polytechnical University, Xi’an 710072, China;1. Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, 621010 Mianyang, Sichuan, China;2. National Key Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, Chinese Academy of Engineering Physics, Mianyang 621900, China;1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2. Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Magnetic and magneto-optical properties of MnSb films with different crystalline orientations on various semiconductors of GaAs(1 0 0), GaAs(1 1 1)A, B, and sapphire(0 0 0 1) have been measured by a vibrating sample magnetometer (VSM) and a home-made magneto-optical Kerr effect (MOKE) system. All these samples have their easy axes in the plane and show ferromagnetic properties. Among these samples, the film on GaAs(1 1 1)B has the lowest coercive force Hc and the largest squareness (SQ) value, whereas the film on GaAs(1 0 0) shows the largest Hc and the lowest SQ value. A large Kerr rotation angle of about 0.3° was observed at a wavelength of λ=632.8 nm for the film on sapphire in the field applied both parallel and perpendicular to the film plane. However, the MnSn films on other substrates do not have an observable Kerr rotation. The dynamic effect of the hysteresis was also measured using our MOKE system. As the frequency of applied magnetic field increases, the loop rounds off at the corners and the loop area increases. |
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