Investigation of Griffiths phase,spin reorientation and magnetism in double perovskite Gd2FeMnO6 |
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| Affiliation: | 1. Engineering Technology Research Center of Magnetic Materials, School of Materials Science and Engineering, Anhui University, Hefei, 230601, People’s Republic of China;2. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, Anhui, China;1. College of Electronic Information and Optical Engineering, Nankai University, Tianjin, 300350, China;2. Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin, 300350, China;3. School of Physics, Nankai University, Tianjin, 300350, China;4. School of Opto-electronic Information, University of Electronic Science and Technology, Chengdu, 610054, China;5. Engineering Research Center of Thin Film Optoelectronics Technology, Ministry of Education, Nankai University, Tianjin, 300350, China;1. Saint-Petersburg State Institute of Technology, Saint Petersburg, 190013, Russian Federation;2. Ioffe Institute, Saint Petersburg, 194021, Russian Federation;1. School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang, 471023, China;2. Key Laboratory of Material Physics of Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou, 450052, China;1. Department of Orthopedics, Guangdong Provincial People''s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, 510080, PR China;2. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, PR China;3. National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou, 510006, PR China |
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| Abstract: | In this study, double perovskites of Gd2FeMnO6 (GFMO) are successfully prepared using the solid-state reaction method. X-ray diffraction results indicate that GFMO has an orthogonal structure (space group Pnma). Moreover, X-ray photoelectron spectroscopy results show mixed-valence states of 3d transition ions. A further analysis of thermomagnetic data suggests that, in addition to the canted antiferromagnetism and spin reorientation, there is also a Griffiths phase with an antiferromagnetic ground state caused by ferromagnetic short-range interactions and confirmed by electron spin resonance analysis. Antisite-disordered B-site ions give rise to different short-range magnetic orders, which disrupt the long-range ferromagnetic order of Fe–O–Mn, leading to the formation of a short-range ferromagnetic order. Furthermore, with magnetocaloric magnitudes of 17.0 J kg−1 K−1 for 0–50 kOe, GFMO polycrystalline is a promising candidate for magnetic refrigerants in the ultra-low temperature range. Finally, the change in magnetic entropy due to spin reorientation at room temperature (285K) has potential applications in thermostatic water bath switches. |
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| Keywords: | Perovskite Griffiths phase Spin reorientation Magnetocaloric effect |
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