双钙钛矿氧化物Pr_(2-x)Tb_xCoMnO_6(x=0.00,0.05,0.10)的磁性研究
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摘要
利用传统高温固相反应法制备了钙钛矿钴氧化物Pr_(2-x)Tb_xCoMnO_6(x=0.00,0.05,0.10)系列多晶样品,通过样品的XRD谱线、磁化强度随温度、外加磁场的变化曲线(M-T、M-H)等对样品的晶体结构和磁性进行了研究.结果表明:系列样品Pr_(2-x)Tb_xCoMnO_6(x=0.00,0.05,0.10)呈现良好的单相性,空间点群为P2_1/n;由于Co~(2+)与Mn~(4+)之间的铁磁超交换相互作用和少量无序的Co~(3+)与Mn~(3+)之间的铁磁超交换相互作用,3个样品均出现两个铁磁转变点(T_(C1)和T_(C2)),观察到系列样品存在类Griffiths相,温度T>T_G则为纯顺磁态;在T_(C2)-T_G之间属于顺磁-铁磁共存状态;在低温区(T A series of polycrystalline samples of perovskite cobalt oxide Pr_(2-x)Tb_xCoMnO_6(x=0.00,0.05,0.10) were prepared by traditional high-temperature solid-state reaction. The XRD spectra, magnetization curves and variation curve of applied magnetic field(M-T, M-H) with temperature were measured to study the crystal structure and magnetic properties of the sample. The results show that the series of samples Pr_(2-x)Tb_xCoMnO_6(x=0.00,0.05,0.10) exhibited good single phase. The spatial point group was P2_1/n. Due to the ferromagnetic super-exchange interaction between Co~(2+) and Mn~(4+) and a small amount of disordered ferromagnetic super-exchange interaction between Co~(3+) and Mn~(3+), two ferromagnetic transition points appeared in all the three samples. It is observed that there is a Griffiths-like phase in the series of samples. When temperature T was higher than T_G, it showed pure paramagnetic state. When temperature was between T_(C2)-T_G, it showed paramagnetic-ferromagnetic coexistence state. At low temperature(T
引文
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[17] Chen Chunxia. Research progress of charge ordering in perovskite manganese oxide[J]. Journal of Inorganic Materials, 2005, 20(1): 1-12(in Chinese).陈春霞. 钙钛矿锰氧化物中电荷有序现象研究进展[J]. 无机材料学报, 2005, 20(1):1-12.
[18] Xiang Junyou, Wang Zhiguo, Hu Yuzhen, et al.Research progress of Griffiths-like phases[J].Yinshan Journal (Natural Science Edition),2014,28(3):26-29(in Chinese).向俊尤,王志国,胡玉彪,等.类Griffiths相的研究进展[J].阴山学刊(自然科学版),2014,28(3):26-29.
[19] Murthy J K, Chandrasekhar K D, Venimadhav A. Observation of Griffiths-like phase and its tunability in La2Ni1-xCoxMnO6,(0≤x≤1) nanoparticles[J].Journal of Magnetism & Magnetic Materials, 2016,418:2-8.
[20] Xing Ru, Zheng Lin, Zhou Min, et al. Study on Griffiths phase of Gd doped manganese oxide Pr(0.5)Sr(0.5)MnO3[J].Journal of Low Temperature Physics, 2016(6):51-54(in Chinese).邢茹,郑琳,周敏,等.Gd掺杂锰氧化物Pr(0.5)Sr(0.5)MnO3的Griffiths相研究[J].低温物理学报, 2016(6):51-54.
[21] Palakkal J P, Sankar C R, Varma M R. Multiple magnetic transitions, Griffiths-like phase, and magnetoresistance in La2CrMnO6[J]. Journal of Applied Physics, 2017, 122(7):1-8.
[22] Mandal P R, Nath T K. Evolution of Griffith phase in hole doped double perovskite La2xSrxCoMnO6 (x=0.0, 0.5, and 1.0)[J]. Materials Research Express, 2015, 2(6):1-14.
[23] Harikrishnan S N, Diptikanta S, Hariharan N, et al. Griffiths phase-like behavior and spin-phonon coupling in double perovskite Tb2NiMnO6[J]. Journal of Applied Physics, 2011, 110(12):1-7.
[24] Sahoo R C, Paladhi D, Nath T K. Evidence of spin-glass like ordering and exchange bias effect in antisite-disordered nanometric La1.5Ca0.5CoMnO6 double perovskite[J].Journal of Magnetism and Magnetic Materials, 2017,436:1-29.
[25] Fang Liu, Yu Gao, Hong Chang, et al. Control of magnetic properties and band gap by Co/Mn ordering and oxygen distributions of La2CoMnO6[J].Journal of Magnetism and Magnetic Materials, 2017,435:217-222.
[26] Zhang J H, MukherJ S, Wu H C, et al. Magnetodielectric consequences in double perovskite Pr2CoMnO6[J]. Journal of Electronic Materials, 2012,44(11):1-8.
[2] Bull C L, Gleeson D, Knight K S. Determination of B-site ordering and structural transformations in the mixed transition metal perovskites La2CoMnO6 and La2NiMnO6[J]. Journal of Physics Condensed Matter, 2003, 15(29):4927-4936.
[3] Singh M P, Truong K D, Fournier P. Magnetodielectric effect in double perovskite La2CoMnO6 thin films[J]. Applied Physics Letters, 2007, 91(4):1-4.
[4] Mahato R N, Sethupathi K, Sankaranarayanan V. Colossal magnetoresistance in the double perovskite oxide La2CoMnO6[J]. Journal of Applied Physics, 2010, 107(9):1-4.
[5] Baidya S, Saha-Dasgupta T. Electronic structure and phonons in La2CoMnO6: a ferromagnetic insulator driven by Coulomb-assisted spin-orbit coupling[J]. Phys Rev B,2011,84(3):1651-1659.
[6] Asai K, Fujiyoshi K, Nishimori N, et al. Magnetic properties of REMe0.5Mn0.5O3, (RE=rare earth element, Me=Ni, Co)[J]. Journal of the Physical Society of Japan, 1999, 67(12):4218-4228.
[7] Yanezvilar S, Mun E D, Zapf V S, et al. Multiferroic behavior in the new double-perovskite Lu2MnCoO6[J]. Physics, 2011, 84(13):1-8.
[8] Sharma G,Saha J,Kaushik S D,et al.Magnetism driven ferroelectricity above liquid nitrogen temperature in Y2CoMnO6[J].Applied Physics Letters,2013,103(1):1-5.
[9] Sazonov A P, Troyanchuk I O, Kozlenko D P, et al. Magnetic ordering in the Nd2CoMnO6 perovskite system[J]. Journal of Magnetism & Magnetic Materials, 2006, 302(2):443-447.
[10] Lin Yiqi. Dielectric and magnetic properties of La-based double perovskite ceramics [D]. Hangzhou: Zhejiang University, 2010(in Chinese).林亦琦. La系双钙钛矿陶瓷的介电与磁学性能[D].杭州: 浙江大学,2010.
[11] Liu Wenjie. Study on the structure and physical properties of double perovskite Ln2Ni/CoMnO6 [D]. Hefei: University of Science and Technology of China, 2015(in Chinese).刘文杰. 双钙钛矿Ln2Ni/CoMnO6体系结构及物性研究[D].合肥: 中国科学技术大学,2015.
[12] Liu W, Shi L, Zhou S, et al. Griffiths phase, spin-phonon coupling, and exchange bias effect in double perovskite Pr2CoMnO6[J]. Journal of Applied Physics, 2014, 116(19):1-6.
[13] Wang L Y, Li Q, Gong Y Y, et al. The positive and negative magnetodielectric effects in double perovskite Pr2CoMnO6[J]. Journal of the American Ceramic Society, 2014, 97(7):2024-2026.
[14] Burnus T, Hu Z, Hsieh H H, et al. Local electronic structure and magnetic properties of LaMn0.5Co0.5O3 studied by X-ray absorption and magnetic circular dichroism spectroscopy[J]. Phys Rev B, 2008, 77(12):45-46.
[15] Vasiliev A N, Volkova O S, Lobanovskii L S, et al. Valence states and metamagnetic phase transition in partially B-site-disordered perovskite EuMn0.5Co0.5O3[J]. Phys Rev B, 2008, 77(10):1-5.
[16] Yun Huiqin, Zheng Lin, Duan Yumei, et al. Study on magnetic and electrical properties of perovskite manganese oxide La(1.3-x)DyxSr1.7Mn2O7(x=0.025)[J].Chinese Journal of Low Temperature Physics, 2017, 39 (03): 40-43.(in Chinese).云慧琴,郑琳,段玉梅,等.钙钛矿锰氧化物La(1.3-x)DyxSr1.7Mn2O7(x=0.025)的磁性和电性研究[J].低温物理学报,2017,39(03):40-43.
[17] Chen Chunxia. Research progress of charge ordering in perovskite manganese oxide[J]. Journal of Inorganic Materials, 2005, 20(1): 1-12(in Chinese).陈春霞. 钙钛矿锰氧化物中电荷有序现象研究进展[J]. 无机材料学报, 2005, 20(1):1-12.
[18] Xiang Junyou, Wang Zhiguo, Hu Yuzhen, et al.Research progress of Griffiths-like phases[J].Yinshan Journal (Natural Science Edition),2014,28(3):26-29(in Chinese).向俊尤,王志国,胡玉彪,等.类Griffiths相的研究进展[J].阴山学刊(自然科学版),2014,28(3):26-29.
[19] Murthy J K, Chandrasekhar K D, Venimadhav A. Observation of Griffiths-like phase and its tunability in La2Ni1-xCoxMnO6,(0≤x≤1) nanoparticles[J].Journal of Magnetism & Magnetic Materials, 2016,418:2-8.
[20] Xing Ru, Zheng Lin, Zhou Min, et al. Study on Griffiths phase of Gd doped manganese oxide Pr(0.5)Sr(0.5)MnO3[J].Journal of Low Temperature Physics, 2016(6):51-54(in Chinese).邢茹,郑琳,周敏,等.Gd掺杂锰氧化物Pr(0.5)Sr(0.5)MnO3的Griffiths相研究[J].低温物理学报, 2016(6):51-54.
[21] Palakkal J P, Sankar C R, Varma M R. Multiple magnetic transitions, Griffiths-like phase, and magnetoresistance in La2CrMnO6[J]. Journal of Applied Physics, 2017, 122(7):1-8.
[22] Mandal P R, Nath T K. Evolution of Griffith phase in hole doped double perovskite La2xSrxCoMnO6 (x=0.0, 0.5, and 1.0)[J]. Materials Research Express, 2015, 2(6):1-14.
[23] Harikrishnan S N, Diptikanta S, Hariharan N, et al. Griffiths phase-like behavior and spin-phonon coupling in double perovskite Tb2NiMnO6[J]. Journal of Applied Physics, 2011, 110(12):1-7.
[24] Sahoo R C, Paladhi D, Nath T K. Evidence of spin-glass like ordering and exchange bias effect in antisite-disordered nanometric La1.5Ca0.5CoMnO6 double perovskite[J].Journal of Magnetism and Magnetic Materials, 2017,436:1-29.
[25] Fang Liu, Yu Gao, Hong Chang, et al. Control of magnetic properties and band gap by Co/Mn ordering and oxygen distributions of La2CoMnO6[J].Journal of Magnetism and Magnetic Materials, 2017,435:217-222.
[26] Zhang J H, MukherJ S, Wu H C, et al. Magnetodielectric consequences in double perovskite Pr2CoMnO6[J]. Journal of Electronic Materials, 2012,44(11):1-8.