本文選題：電荷轉(zhuǎn)移　切入點(diǎn)：磁性薄膜　出處：《大連理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：現(xiàn)代電子信息技術(shù)朝著微型化、超高密度存儲(chǔ)的方向在不斷地發(fā)展,將分子磁性材料薄膜化或制成相應(yīng)的微磁器件是滿足這一發(fā)展的最有效途徑。磁性薄膜由于其獨(dú)特的特性,如結(jié)構(gòu)穩(wěn)定,較強(qiáng)的磁各向異性等,目前在磁存儲(chǔ)、磁記憶、磁開關(guān)等方面已有許多應(yīng)用。在這其中,電荷轉(zhuǎn)移磁性復(fù)合薄膜可以利用外界刺激控制分子內(nèi)白旋電子的遷移,調(diào)控自旋之間的耦合作用以及磁各向異性,從而實(shí)現(xiàn)分子層次上磁性雙穩(wěn)態(tài)的調(diào)控,這引起了世界各國研究者們的注意。因此我們設(shè)想,選用具有雙穩(wěn)態(tài)性質(zhì)的磁性晶體材料為原料,具有較高玻璃化轉(zhuǎn)變溫度的高分子為載體,利用高分子與晶體間形成的氫鍵相互作用來制備一類既能保持原有晶體特性且可重復(fù)制備的高質(zhì)量薄膜,這將是一個(gè)有趣但富有挑戰(zhàn)性的工作。基于以上構(gòu)想,本課題從以下兩方面來開展工作：1、制備難溶性晶體Fe2Co的電荷轉(zhuǎn)移磁性復(fù)合薄膜室溫下,構(gòu)筑基元[Fe(pzTp)(CN)3]與第二配體4-吡啶醛肟以及Co(ClO4)2·6H2O進(jìn)行自組裝合成了結(jié)構(gòu)為異金屬一維雙之字鏈的Fe2Co磁性晶體材料。Fe2Co晶體具有雙穩(wěn)態(tài),可以利用外界刺激實(shí)現(xiàn)其分子層次上磁性雙穩(wěn)態(tài)的調(diào)控,是制備電荷轉(zhuǎn)移磁性復(fù)合薄膜的理想材料。由于Fe2Co晶體的一維鏈狀結(jié)構(gòu),其本身難溶于有機(jī)溶劑DMF,所以制備薄膜過程中晶體顆粒的溶解需要借助于外界長時(shí)間的超聲作用。制備的Fe2Co薄膜中針狀的晶體顆粒僅是部分鑲嵌于高分子HPMC中,薄膜表面的均勻性與致密性較差,但薄膜中原有晶體的主要結(jié)構(gòu)并沒有發(fā)生改變,并且所制備的薄膜結(jié)構(gòu)性能穩(wěn)定、可重復(fù)制備。2、制備可溶性晶體Fe2Co2的電荷轉(zhuǎn)移磁性復(fù)合薄膜室溫下,構(gòu)筑基元[Fe(Tp)(CN)3]-與第二配體2,2'-二毗啶胺以及Co(NO)3·6H2O進(jìn)行自組裝合成具有分子四方結(jié)構(gòu)的零維四核晶體材料Fe2Co2。以Fe2Co2這種易溶性的且具有雙穩(wěn)態(tài)性質(zhì)的磁性晶體材料為原料,高分子HPMC為載體,利用高分子本身良好的分散性和優(yōu)良的成膜能力,通過溶膠-凝膠的成膜方法和浸漬-涂布的涂膜方式,成功制備出了保持原有雙穩(wěn)態(tài)性質(zhì)、結(jié)構(gòu)穩(wěn)定、均勻致密且可重復(fù)制備的Fe2Co2電荷轉(zhuǎn)移磁性復(fù)合薄膜。電荷轉(zhuǎn)移磁性復(fù)合薄膜的成功制備實(shí)現(xiàn)了分子磁性材料的功能化轉(zhuǎn)變,同時(shí)也為磁性材料的應(yīng)用拓展了一條新的途徑,可以應(yīng)用于傳感器、磁開關(guān)等方面。
[Abstract]:Modern electronic information technology is developing in the direction of miniaturization and ultra-high density storage. Thinning molecular magnetic materials or making corresponding micromagnetic devices is the most effective way to meet this development. For example, stable structure, strong magnetic anisotropy and so on, there are many applications in magnetic storage, magnetic memory, magnetic switch and so on. Among them, the charge transfer magnetic composite film can control the transfer of intramolecular white spin electrons by external stimulation. The regulation of spin-to-spin coupling and magnetic anisotropy to achieve the regulation of magnetic bistability at the molecular level has attracted the attention of researchers all over the world. The bistable magnetic crystal material is used as raw material, and the polymer with high glass transition temperature is used as carrier. It will be an interesting but challenging work to prepare a class of high quality films which can retain the original crystal properties and can be prepared repeatedly by using the hydrogen bond interaction between the polymer and the crystal. In this paper, the following two aspects of work were carried out to prepare the charge transfer magnetic composite films of insoluble crystal Fe2Co at room temperature. Self-assembly of Fe(pzTp)(CN)3 with the second ligand 4-pyridyl aldoxime and Co(ClO4)2 路6H2O the bistable structure of the Fe2Co magnetic crystal material. Fe2Co crystal with one-dimensional double zigzag chain was synthesized. The control of magnetic bistability at molecular level can be realized by external stimulation, which is an ideal material for the preparation of charge transfer magnetic composite films. Because of the one-dimensional chain structure of Fe2Co crystal, It is insoluble in the organic solvent DMF, so the dissolution of the crystal particles in the preparation process of the film needs the help of the external long-term ultrasonic action. The needle-like crystal particles in the prepared Fe2Co thin film are only partially embedded in the high molecular HPMC. The surface uniformity and densification of the films are poor, but the main structure of the original crystals in the films has not changed, and the structure and properties of the films prepared are stable. The charge transfer magnetic composite films of soluble crystal Fe2Co2 can be prepared repeatedly at room temperature. Self-assembly synthesis of zero-dimensional tetranuclear crystal material Fe _ 2Co _ 2 with molecular tetragonal structure by self-assembly with the second ligand 2O2O2-dipyridamine and Co(NO)3 路6H2O was carried out using Fe2Co2, a readily soluble and bistable magnetic crystal material, as the raw material for the synthesis of Fe _ 2Co _ 2, a structuring unit [Fe(Tp)(CN)3], and its second ligand, dipyridamine, and Co(NO)3 路6H _ 2O. The polymer HPMC was successfully prepared by the sol-gel film forming method and the impregnation-coating method, using the excellent dispersity and excellent film forming ability of the polymer, and maintaining the original bistable property and the stable structure, by using the sol-gel method and the impregnation-coating method, the polymer HPMC was used as the carrier, and the structure of the polymer was stable. Uniform dense and repeatable Fe2Co2 charge transfer magnetic composite thin films. The successful preparation of charge transfer magnetic composite thin films has realized the functional transition of molecular magnetic materials, and has also opened a new way for the application of magnetic materials. It can be used in sensor, magnetic switch and so on.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 ;磁性薄膜的制備[J];金屬功能材料;1999年05期

2 ;其他[J];中國光學(xué)與應(yīng)用光學(xué)文摘;2001年01期

3 金延 ,曉敏;磁性薄膜[J];金屬功能材料;2003年05期

4 杜朝鋒;黃英;秦秀蘭;;納米磁性薄膜的研究進(jìn)展[J];兵器材料科學(xué)與工程;2007年02期

5 張君霞,陳洪;變分累積展開對不同格點(diǎn)結(jié)構(gòu)的磁性薄膜的熱動(dòng)力學(xué)性質(zhì)的研究[J];西南師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年03期

6 陳國鈞,褚維;高技術(shù)磁性薄膜及其產(chǎn)品開發(fā)[J];金屬功能材料;1999年06期

7 張路長;宣天鵬;琚正挺;;鈷鎳基磁性薄膜的研究現(xiàn)狀及進(jìn)展[J];金屬功能材料;2006年04期

8 金延 ,啟明 ,長征;磁性薄膜的制備[J];金屬功能材料;2003年06期

9 王軍;殷俊林;嚴(yán)彪;;鐵基多層納米磁性薄膜的組織與磁性能研究[J];上海金屬;2011年04期

10 吉吾爾·吉里力;拜山·沙德克;;磁性多層膜中保護(hù)層Ru對磁性層NiFe的影響[J];功能材料;2008年11期

相關(guān)會(huì)議論文 前10條

1 陳將偉;唐東明;張豹山;楊q，

本文編號：1635352