Sm_(0.5)Ca_(0.5)Mn_(1-x)Al_xO_3的制备及低温磁性质研究
|
摘要
通过高温固相法制备了单相多晶样品,对样品的磁性质进行测量与分析.XRD结构分析表明,该样品为单相正交结构,空间群为Pnma.磁性的测量表明,低温下样品为相分离态.ZFC和FC出现分叉,表现出典型的相分离特征,在ZFC曲线6K处出现一个小峰.红外吸收光谱分析表明了Al掺杂引起MnO_6八面体的畸变.Sm_(0.5)Ca_(0.5)Mn_(0.90)Al_(0.10)O_3交流磁化率曲线实部峰没有随频率的变化发生很明显的温度偏移,而其虚部峰随频率的增加而下降.
Sm_(0.5)Ca_(0.5) Mn_(0.90)Al_(0.10)O_3 was prepared by high temperature solid phase synthesis technique as polycrystalline samples.XRD analysis of these samples indicates all the samples are single phase with orthorhombic structure and their space groups are Pnma.Magnetic measurements indicate that the samples are phase separation state at low temperature.It is a typically quality,phase separation characteristics,and there is a divarication between ZFC and FC.Furthermore,a week peak appears when the temperature is 6Kon ZFC.Infrared absorption spectrum analysis indicates that Al dopping leads to distortion of MnO_6 octahedral.The samples' ac susceptibility curve,shows that the real peak with increasing frequency is not obvious temperature movement,while the imaginary part peak value decreases with increasing frequency.
Sm_(0.5)Ca_(0.5) Mn_(0.90)Al_(0.10)O_3 was prepared by high temperature solid phase synthesis technique as polycrystalline samples.XRD analysis of these samples indicates all the samples are single phase with orthorhombic structure and their space groups are Pnma.Magnetic measurements indicate that the samples are phase separation state at low temperature.It is a typically quality,phase separation characteristics,and there is a divarication between ZFC and FC.Furthermore,a week peak appears when the temperature is 6Kon ZFC.Infrared absorption spectrum analysis indicates that Al dopping leads to distortion of MnO_6 octahedral.The samples' ac susceptibility curve,shows that the real peak with increasing frequency is not obvious temperature movement,while the imaginary part peak value decreases with increasing frequency.
引文
[1]Jin S,Teifel T H,McCormack M,et al.Thousandfold change in re-sistivity in magnetoresistive La-Ca-Mn-O films[J].Science,1994,264(5157):413-415.
[2]刘宁,孙勇,董伟,等.La2/3Ca1/3MnO3中绝缘体-金属相变与CMR效应[J].低温物理学报,2001,23(1):1-5.
[3]Rao C N R,Cheetham A K.Charge ordering in manganates[J].Sci-ence,1997,276(5314):911-912.
[4]Pradhan A K,Roul B K,Wen J G,et al.Enhanced room-temperature magnetoresistance in partially melted LaCaMnO3 manganites[J].Appl Phys Lett,2000(76):763-765.
[5]Damari L,Pelleg J,Gorodetsky G,et al.The effect of Ni doping on the magnetic and transport properties in Pr0.5Ca0.5Mn1-xNix O3 manganites[J].J Appl Phys,2009,106(1):13913-13922.
[6]Yao X,Jin Y,Li M,et al.First-principles study of the ferroelectric and optical properties of BaTeMo2O9[J].J Alloys Compd,2011,509(15):4929-4934.
[7]Phan M H,Franco V,Bingham N S,et al.Tricritical point and critical exponents of La0.7Ca0.3-xSrxMnO3(χ=0,0.05,0.1,0.2,0.25)single crystals[J].J Alloys Compd,2010,508(2):238-244.
[8]张敏,史俊杰.Ti,Mn,Fe掺杂的GaN纳米管的电子结构及磁学性质[J].内蒙古大学学报:自然科学版,2015,46(2):156-161.
[9]Li.F,Fang J.Glassy-ferromagnetic behavior in Eu0.5Sr0.5CoO3[J].Journal of Magnetism and Magnetic Materials,2012,324(17):2664-2668.
[10]焦正宽,曹光旱.磁电子学[M].杭州:浙江大学出版社,2005:6.
[11]沙燕娜,张金仓,曹桂新,等.窄带隙Pr0.6Ca0.4MnO3体系的电荷有序和多重磁化转变[J].低温物理学报,2005,27(5):445-451.
[12]Bujakiewicz-Koronska R,Nalecz DM,Balanda M,et al.Electronic and magnetic properties of(Bi0.5Na0.5)(Mn0.5Nb0.5)O-3[J].Phase Transiyions,2014,87(10-11):1096-1104.
[13]李合琴,陈志宝.Ca1-xYxMnO3体系的电磁输运性能及团簇玻璃态行为[J].合肥工业大学学报,2005,28:1039-1042.
[14]BarnabéA,Hervieu M,Martin C,et al.Role of the A-site size and oxygen stoichiometry in charge ordering commensurability of Ln0.50Ca0.50MnO3 manganites[J].J Appl Phys,1998,84(10):5506-5514.
[15]Hervieu M,BarnabéA,Martin C,et al.Evolution of charge ordering in Ca1-xSmxMnO3 manganites(0.15≤x≤0.60)[J].Eur Phys J B,1999,8:31-41.
[16]Hejtmánek J,Jirák Z,Sebek J,et al.Magnetic phase diagram of the charge ordered manganite Pr0.8Na0.2MnO3[J].J Appl Phys,2001,89(11):7413-7415.
[17]Satoh T,Kikuchi Y,Miyano K,et al.Irreversible photoinduced insulator-metal transition in the Na-doped manganitePr0.75Na0.25MnO3[J].Phys Rev B,2002,65(12):125103-125106.
[18]亓淑艳,冯静,侯相钰,等.钙钛矿La0.5Sr0.5Mn1-xCoxO3的制备及磁性研究[J].材料导报,2008,22(1):134-136.
[19]Fisher L M,Kalinov A V,Voloshin I F,et al.Pr1-xCaxMnO3system in the crossover region between different kinds of magnetic ordering[J].J Magn Magn Matertt,2003,258-259(3):306-308.
[20]Satoh T,Kikuchi Y,Miyano K,et al.Irreversible photoinduced insulator-metal transition in the Na-doped manganitePr0.75Na0.25MnO3[J].Phys Rev B,2002,65(12):125103-125106.
[2]刘宁,孙勇,董伟,等.La2/3Ca1/3MnO3中绝缘体-金属相变与CMR效应[J].低温物理学报,2001,23(1):1-5.
[3]Rao C N R,Cheetham A K.Charge ordering in manganates[J].Sci-ence,1997,276(5314):911-912.
[4]Pradhan A K,Roul B K,Wen J G,et al.Enhanced room-temperature magnetoresistance in partially melted LaCaMnO3 manganites[J].Appl Phys Lett,2000(76):763-765.
[5]Damari L,Pelleg J,Gorodetsky G,et al.The effect of Ni doping on the magnetic and transport properties in Pr0.5Ca0.5Mn1-xNix O3 manganites[J].J Appl Phys,2009,106(1):13913-13922.
[6]Yao X,Jin Y,Li M,et al.First-principles study of the ferroelectric and optical properties of BaTeMo2O9[J].J Alloys Compd,2011,509(15):4929-4934.
[7]Phan M H,Franco V,Bingham N S,et al.Tricritical point and critical exponents of La0.7Ca0.3-xSrxMnO3(χ=0,0.05,0.1,0.2,0.25)single crystals[J].J Alloys Compd,2010,508(2):238-244.
[8]张敏,史俊杰.Ti,Mn,Fe掺杂的GaN纳米管的电子结构及磁学性质[J].内蒙古大学学报:自然科学版,2015,46(2):156-161.
[9]Li.F,Fang J.Glassy-ferromagnetic behavior in Eu0.5Sr0.5CoO3[J].Journal of Magnetism and Magnetic Materials,2012,324(17):2664-2668.
[10]焦正宽,曹光旱.磁电子学[M].杭州:浙江大学出版社,2005:6.
[11]沙燕娜,张金仓,曹桂新,等.窄带隙Pr0.6Ca0.4MnO3体系的电荷有序和多重磁化转变[J].低温物理学报,2005,27(5):445-451.
[12]Bujakiewicz-Koronska R,Nalecz DM,Balanda M,et al.Electronic and magnetic properties of(Bi0.5Na0.5)(Mn0.5Nb0.5)O-3[J].Phase Transiyions,2014,87(10-11):1096-1104.
[13]李合琴,陈志宝.Ca1-xYxMnO3体系的电磁输运性能及团簇玻璃态行为[J].合肥工业大学学报,2005,28:1039-1042.
[14]BarnabéA,Hervieu M,Martin C,et al.Role of the A-site size and oxygen stoichiometry in charge ordering commensurability of Ln0.50Ca0.50MnO3 manganites[J].J Appl Phys,1998,84(10):5506-5514.
[15]Hervieu M,BarnabéA,Martin C,et al.Evolution of charge ordering in Ca1-xSmxMnO3 manganites(0.15≤x≤0.60)[J].Eur Phys J B,1999,8:31-41.
[16]Hejtmánek J,Jirák Z,Sebek J,et al.Magnetic phase diagram of the charge ordered manganite Pr0.8Na0.2MnO3[J].J Appl Phys,2001,89(11):7413-7415.
[17]Satoh T,Kikuchi Y,Miyano K,et al.Irreversible photoinduced insulator-metal transition in the Na-doped manganitePr0.75Na0.25MnO3[J].Phys Rev B,2002,65(12):125103-125106.
[18]亓淑艳,冯静,侯相钰,等.钙钛矿La0.5Sr0.5Mn1-xCoxO3的制备及磁性研究[J].材料导报,2008,22(1):134-136.
[19]Fisher L M,Kalinov A V,Voloshin I F,et al.Pr1-xCaxMnO3system in the crossover region between different kinds of magnetic ordering[J].J Magn Magn Matertt,2003,258-259(3):306-308.
[20]Satoh T,Kikuchi Y,Miyano K,et al.Irreversible photoinduced insulator-metal transition in the Na-doped manganitePr0.75Na0.25MnO3[J].Phys Rev B,2002,65(12):125103-125106.