A. ChangjanP. UdomsamuthirunSrinakharinwirot UniversityThailand Center of Excellence in PhysicsMahidol University2018-05-032018-05-032011-01-01Physica C: Superconductivity and its Applications. Vol.471, No.1-2 (2011), 23-25092145342-s2.0-78650798504https://repository.li.mahidol.ac.th/handle/20.500.14594/11855The upper critical field, the lower critical field and the critical magnetic field ratio of anisotropic magnetic superconductors are calculated by Ginzburg-Landau theory analytically. The effect of the Ginzburg-Landau parameter (κ 0 ), magnetic susceptibility (χ) and magnetic-to- anisotropic parameter ratio (θ) on the critical field ratio are considered. We find that the value of critical field ratio increases with increasing κ 0 and θ, and decreases with increasing χ. The highest and the lowest value of critical field ratio is found in the diamagnetic superconductors and the ferromagnetic superconductors, respectively. © 2010 Elsevier B.V. All rights reserved.Mahidol UniversityEnergyEngineeringMaterials SciencePhysics and AstronomyArticleSCOPUS10.1016/j.physc.2010.10.002