镍锰铁氧体纳米线阵列的制备与表征  

Preparation and characterization of nickel manganese ferrite

作　　者：顾建军[1,2,3] 韩金荣[1] 成福伟[1] 赵国良[1] 刘力虎[2,3] 孙会元[2,3] 

机构地区：[1]河北民族师范学院物理系,承德067000 [2]河北师范大学物理科学与信息工程学院,石家庄050016 [3]河北省新型薄膜材料重点实验室,石家庄050016

出　　处：《物理学报》2012年第9期424-429,共6页Acta Physica Sinica

基　　金：河北省自然科学基金(批准号:A2012101001;A2012205038);河北省教育厅基金(批准号:Z2007422);河北民族师范学院科研基金(批准号:201114)资助的课题~~

摘　　要：采用真空负压灌注技术,结合溶胶-凝胶法在多孔氧化铝模板的纳米孔洞中成功制备了平均直径为80 nm左右的Ni_1-xMnxFe_2O_4(X=0,0.25,0.5,0.75)纳米线阵列.XRD结果显示所制备的纳米线阵列为立方尖晶石结构,SEM和TEM的结果表明纳米线是由大量不同晶体取向的亚微晶粒联接组成.磁测量结果显示,随着Mn掺杂浓度的增加,饱和磁化强度先增加而后减小,这种变化与离子在尖晶石结构中的替代、占位变化有关.相比于块体材料的NiFe_2O_4,由于非线性磁结构比例的增加,导致了线体NiFe_2O_4的饱和磁化强度降低.of Ni1-xMnxFe204 （z = 0.0, 0.25, 0.5, 0.75） nanowires with an average diameter of about 80 nm are prepared by porous anodic aluminum oxide membrane poured sol technique. X-ray diffraction analysis shows that the nickel manganese ferrites nanowires with cubic spinel structure are synthetized. Scanning electron microscopy and transmission electron microscope images indicate that the nanowire arrays are composed of prolate spheroids with different crystal orientations. Magnetic measurements show that saturation magnetization increases and then decreases with Mn increasing. The change is related to the location and the substitution of ion in spinel structure. Compared with of block material NiFe204, the saturation magnetization of nickel ferrite nanowire arrays is low. This is due to the fact that the noncollinear magnetic structure in nanowire arrays become predominant.

关 键 词：镍锰铁氧体纳米线 多孔氧化铝模板 磁性表征 

分 类 号：TB383.1[一般工业技术—材料科学与工程]