CN113913935A - 一种T型BiFeO3铁电薄膜材料的制备方法 - Google Patents
一种T型BiFeO3铁电薄膜材料的制备方法 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000010408 film Substances 0.000 claims abstract description 51
- 229910002902 BiFeO3 Inorganic materials 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 33
- 238000001755 magnetron sputter deposition Methods 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 229910002244 LaAlO3 Inorganic materials 0.000 claims abstract description 10
- 238000004544 sputter deposition Methods 0.000 claims description 36
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 229910019606 La0.5Sr0.5CoO3 Inorganic materials 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
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- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000000407 epitaxy Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 2
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Abstract
本发明公开了一种T型BiFeO3铁电薄膜材料的制备方法,通过磁控溅射的方法在LaAlO3(001)基底上形成La0.5Sr0.5CoO3薄膜底电极和T型BiFeO3薄膜,即得到T型BiFeO3铁电薄膜材料。该方法能够在底电极/基片上制备出一层T型BiFeO3薄膜,该T‑BiFeO3铁电薄膜具有外延结构,体现出极佳的保持特性和抗疲劳特性,具有广泛的应用前景。
Description
技术领域
本发明涉及铁电材料制备领域,具体涉及一种T型BiFeO3铁电薄膜材料的制备方法。
背景技术
氧化物功能薄膜材料因具有丰富的电学、光学、热学、力学、磁学等性质,可被广泛应用于微电子、信息等领域。外延的四方相氧化物功能薄膜在信息存储领域的应用尤为突出。
在众多的氧化物功能薄膜材料中,铁酸铋BiFeO3(BFO)是一种ABO3型钙钛矿铁电材料,具有大的剩余极化强度(100μC/cm2)和较小的禁带宽度(2.7eV),可为光电存储器提供更大的开路电压和短路电流,被普遍认为是新一代光电存储技术的首选材料。BFO为R3c空间群,室温下呈现出三方相(R相),在不同基底集成的异质结中还表现出多种单斜相(MA、MB、MC)。理论和实验研究发现,与单斜相比较,四方相结构的铁酸铋(T-BFO)具有更大的剩余极化强度(150μC/cm2)和较小的介电常数。剩余极化强度大意味着高存储密度,较小的介电常数则能减小存储单元的尺寸,进而提高光电器件的存储密度。T-BFO薄膜的相关实验研究也表明,具有外延结构的T-BFO呈现出极为优异的性能,且可通过调控基底和薄膜间的应力实现T-BFO制备。近年来,虽然人们通过变温、掺杂和选取合适基片等方法制备出了T-BFO薄膜,但是,外延T-BFO薄膜光电存储性能的实现需要底电极支撑。至今,鲜有报道涉及在底电极/基片模板上构架出外延T-BFO薄膜。例如,发明专利申请CN 103540904 A公开了一种制备T相BiFeO3薄膜的方法,以蓝宝石为衬底,将BiFeO3靶材通过磁控溅射沉积在衬底上,从而得到T相BiFeO3薄膜,但是该材料不具有底电极,应用受到限制。因此,如何在底电极/基片模板上构架出外延T-BFO薄膜,提高外延薄膜材料的存储性能是薄膜器件领域目前面临的广泛问题。
在制备外延T-BiFeO3铁电功能薄膜的过程中,金属Pt、Au、Ag等和钙钛矿型氧化物SrRuO3、LaNiO3、La0.7Sr0.3MnO3等常被用作铁电薄膜的底电极材料。由于晶格失配较大,在金属电极上制备的BFO薄膜一般为多晶R相。虽然钙钛矿结构的氧化物电极与BFO具有较好的晶格匹配,但制备出的BFO薄膜多为晶格畸变的T相,这为外延T-BiFeO3铁电功能薄膜的制备造成了很大的困扰。
发明内容
本发明的目的是提供一种T型BiFeO3铁电薄膜材料的制备方法,该方法能够在底电极/基片上制备出一层T型BiFeO3薄膜,该T-BiFeO3铁电薄膜具有外延结构,体现出极佳的保持特性和抗疲劳特性,具有广泛的应用前景。
为了实现上述目的,本发明采取如下技术方案:
一种T型BiFeO3铁电薄膜材料的制备方法,包括如下步骤:
S1:制备La0.5Sr0.5CoO3靶材和BiFeO3靶材并安装于磁控溅射设备中,将LaAlO3(001)基底净化并置于磁控溅射设备的适当位置;
S2:在LaAlO3(001)基底上磁控溅射生长La0.5Sr0.5CoO3薄膜底电极,溅射条件为混合氩气和氧气比例为体积比2~4:1,溅射功率密度为60~80W/cm2,基底温度为600~750℃,溅射时间20~50min;
S3:在La0.5Sr0.5CoO3薄膜底电极上磁控溅射生长T型BiFeO3薄膜,溅射条件为纯氩气氛围,溅射功率密度为50~80W/cm2,基底温度为600~750℃,溅射时间1~3h,即得到T型BiFeO3铁电薄膜材料。
优选的,所述步骤S1中,利用超声波清洗器将LaAlO3(001)先后在丙酮和无水乙醇中清洗,高纯氮气吹干,然后用银胶粘于托盘正中央,放入磁控溅射设备的样品台上。
优选的,所述步骤S2中,本底真空度为10-5~10-4Pa,靶衬间距为3~6cm,溅射过程中压强为1~4Pa,所得La0.5Sr0.5CoO3薄膜底电极的厚度为10nm~200nm。
优选的,在所述步骤S3中,本底真空度为10-5~10-4Pa,靶衬间距为3~
6cm,溅射过程中压强为1~4Pa,所得T型BiFeO3薄膜的厚度为100nm~
1um。
优选的,所述步骤S2和步骤S3中,所述磁控溅射为45度斜向溅射。
本发明在LaAlO3(简记为LAO)基底上首先通过磁控溅射沉积一层La0.5Sr0.5CoO3(简记为LSCO)底电极薄膜,然后再次通过磁控溅射在底电极薄膜上又制备出了T型BiFeO3铁电薄膜,该T-BiFeO3铁电薄膜具有外延结构,体现出极佳的保持特性和抗疲劳特性,因底电极和外延T型BiFeO3共存,所以可以更好地被应用在铁电存储、铁电光伏存储领域。本方法中形成的La0.5Sr0.5CoO3底电极薄膜,能够与BiFeO3更好地进行晶格匹配,从而克服以往用贵金属做底电极时由于晶格失配而导致的BiFeO3薄膜的多晶R相结构,并且还显著降低了所用底电极的材料成本。La0.5Sr0.5CoO3底电极薄膜位于基底与BiFeO3之间,可以有效改变以往基底与BiFeO3直接接触时的界面应力,从而在底电极上顺利生成具有外延结构的T-BiFeO3薄膜,有力促进了材料性能的提升和应用领域的延伸。
附图说明
图1是LSCO/LAO异质结的X射线衍射图谱;
图2是电极/T-BFO/LSCO/LAO异质结的X射线衍射图谱;
图3是电极/T-BFO/LSCO/LAO异质结的phi扫描图谱;
图4是Pt电极/外延T-BiFeO3薄膜/La0.5Sr0.5CoO3底电极/LaAlO3基底异质结的基本结构示意图。
图5是电极/T-BFO/LSCO/LAO电容器的电滞回线。
具体实施方式
下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述,以下实施例用于说明本发明,但不用来限制本发明。
实施例1T型BiFeO3铁电薄膜材料的制备例1:
靶材准备及LaAlO3基片清洗:选用La0.5Sr0.5CoO3靶材和BiFeO3靶材,安装于磁控溅射设备中。利用超声波清洗器将LaAlO3(001)先后在丙酮和无水乙醇中清洗10min,高纯氮气吹干;用银胶粘于托盘正中央,放入磁控溅射设备的样品台上。
磁控溅射生长La0.5Sr0.5CoO3薄膜底电极:本底真空度为4×10-5Pa;靶衬间距为5.5cm;混合氩气和氧气比例为75ml/min:25ml/min;溅射功率密度为70W/cm2;溅射过程中压强为1.4Pa;基底温度为700℃;45度斜向溅射时间为30min;厚度为10nm~200nm。
磁控溅射生长外延T-BiFeO3薄膜:本底真空度为4×10-5Pa;靶衬间距为5.5cm;纯氩气流量为50ml/min;溅射功率密度为70W/cm2;溅射过程中压强为2Pa;基底温度为700℃;溅射时间为2h;厚度为100nm~1um;然后得到T型BiFeO3铁电薄膜材料。
将该材料进行相应的X射线衍射测试,结果如图1至图4所示。
图1为LSCO/LAO异质结的X射线衍射图谱,由图1可见,LSCO/LAO异质结出现了LSCO衍射峰,表明是单相结构。LSCO仅含有(001)、(002)两个衍射峰,说明生长出的LSCO底电极为外延结构。
图2为电极/T-BFO/LSCO/LAO异质结的X射线衍射图谱,由图2可见,电极/T-BFO/LSCO/LAO异质结出现了LSCO衍射峰,表明是单相结构。T-BFO仅含有(001)、(002)两个衍射峰,说明在实验中生长出了T型BiFeO3薄膜,且为外延结构。同时,高的峰值也表明该T-BFO外延铁电薄膜有着高的结晶质量。
图3为电极/T-BFO/LSCO/LAO异质结的phi扫描图谱,由图3可见,样品出现了清晰且间隔均匀90°的四条衍射峰,证明了生长出的T-BFO薄膜为外延结构。
图4为外延T-BiFeO3薄膜/La0.5Sr0.5CoO3底电极/LaAlO3基底异质结的基本结构示意图,该图表面在LaAlO3基底上沉积形成La0.5Sr0.5CoO3底电极薄膜,在La0.5Sr0.5CoO3底电极薄膜上进一步沉积形成外延结构的T-BiFeO3薄膜,从而整体形成了T型BiFeO3铁电薄膜材料,从而克服了以往无法在底电极上形成外延结构的T型BiFeO3薄膜的不足。
实施例2T型BiFeO3铁电薄膜材料的制备例2:
靶材准备及LaAlO3基片清洗:选用La0.5Sr0.5CoO3靶材和BiFeO3靶材,安装于磁控溅射设备中。利用超声波清洗器将LaAlO3(001)先后在丙酮和无水乙醇中清洗10min,高纯氮气吹干;用银胶粘于托盘正中央,放入磁控溅射设备的样品台上。
磁控溅射生长La0.5Sr0.5CoO3薄膜底电极:本底真空度为1×10-5Pa;靶衬间距为6cm;混合氩气和氧气比例为80ml/min:20ml/min;溅射功率密度为80W/cm2;溅射过程中压强为1Pa;基底温度为600℃;45度斜向溅射时间为20min;厚度为10nm~200nm。
磁控溅射生长外延T-BiFeO3薄膜:本底真空度为1×10-5Pa;靶衬间距为6cm;纯氩气流量为50ml/min;溅射功率密度为80W/cm2;溅射过程中压强为1Pa;基底温度为600℃;溅射时间为1h;厚度为100nm~1um;然后得到T型BiFeO3铁电薄膜材料。
将该材料进行相应的X射线衍射测试,结果与实施例1基本一致。
实施例3T型BiFeO3铁电薄膜材料的制备例3:
靶材准备及LaAlO3基片清洗:选用La0.5Sr0.5CoO3靶材和BiFeO3靶材,安装于磁控溅射设备中。利用超声波清洗器将LaAlO3(001)先后在丙酮和无水乙醇中清洗10min,高纯氮气吹干;用银胶粘于托盘正中央,放入磁控溅射设备的样品台上。
磁控溅射生长La0.5Sr0.5CoO3薄膜底电极:本底真空度为1×10-4Pa;靶衬间距为3cm;混合氩气和氧气比例为67ml/min:33ml/min;溅射功率密度为50W/cm2;溅射过程中压强为4Pa;基底温度为750℃;45度斜向溅射时间为50min;厚度为10nm~200nm。
磁控溅射生长外延T-BiFeO3薄膜:本底真空度为1×10-4Pa;靶衬间距为3cm;纯氩气流量为50ml/min;溅射功率密度为50W/cm2;溅射过程中压强为2Pa;基底温度为750℃;溅射时间为3h;厚度为100nm~1um;然后得到T型BiFeO3铁电薄膜材料。
将该材料进行相应的X射线衍射测试,结果与实施例1基本一致。
实施例4实施例1中所制备的T型BiFeO3铁电薄膜材料的性能测验
将实施例1所制备的T型BiFeO3铁电薄膜材料进行性能测验,测试电滞回线,结果如图5所示。由图5中电极/T-BFO/LSCO/LAO异质结的电滞回线中可以看出,电滞回线呈现出良好的饱和趋势,并且获得了很高的剩余极化强度,其值为68.5μC/cm2,无明显漏电流,表明T型BiFeO3外延铁电薄膜具有优异的铁电性能。
以上仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。
Claims (5)
1.一种T型BiFeO3铁电薄膜材料的制备方法,其特征在于包括如下步骤:
S1:制备La0.5Sr0.5CoO3靶材和BiFeO3靶材并安装于磁控溅射设备中,将LaAlO3(001)基底净化并置于磁控溅射设备中;
S2:在LaAlO3(001)基底上磁控溅射生长La0.5Sr0.5CoO3薄膜底电极,溅射条件为混合氩气和氧气体积比为2~4:1,溅射功率密度为60~80W/cm2,基底温度为600~750℃,溅射时间20~50min;
S3:在La0.5Sr0.5CoO3薄膜底电极上磁控溅射生长T型BiFeO3薄膜,溅射条件为纯氩气氛围,溅射功率密度为50~80W/cm2,基底温度为600~750℃,溅射时间1~3h,即得到T型BiFeO3铁电薄膜材料。
2.如权利要求1所述的T型BiFeO3铁电薄膜材料的制备方法,其特征在于,所述步骤S1中,利用超声波清洗器将LaAlO3(001)先后在丙酮和无水乙醇中清洗,高纯氮气吹干,然后用银胶粘于托盘正中央,放入磁控溅射设备的样品台上。
3.如权利要求1所述的T型BiFeO3铁电薄膜材料的制备方法,其特征在于,所述步骤S2中,本底真空度为10-5~10-4Pa,靶衬间距为3~6cm,溅射过程中压强为1~4Pa,所得La0.5Sr0.5CoO3薄膜底电极的厚度为10nm~200nm。
4.如权利要求1所述的T型BiFeO3铁电薄膜材料的制备方法,其特征在于,在所述步骤S3中,本底真空度为10-5~10-4Pa,靶衬间距为3~6cm,溅射过程中压强为1~4Pa,所得T型BiFeO3薄膜的厚度为100nm~1um。
5.如权利要求1所述的T型BiFeO3铁电薄膜材料的制备方法,其特征在于,所述步骤S2和步骤S3中,所述磁控溅射为45度斜向溅射。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103839928A (zh) * | 2014-03-05 | 2014-06-04 | 欧阳俊 | 一种高耐压、低漏电、高极化强度铁酸铋薄膜及其制备方法 |
CN106835052A (zh) * | 2017-04-16 | 2017-06-13 | 北京工业大学 | 利用射频磁控溅射工艺制备BiFeO3薄膜阻变存储器的方法 |
CN109161847A (zh) * | 2018-08-09 | 2019-01-08 | 华南师范大学 | 镓掺杂铁酸铋超四方相外延薄膜及其制备方法和应用 |
CN110289352A (zh) * | 2019-05-24 | 2019-09-27 | 华南师范大学 | 低铁电极化翻转电压的四方相铁酸铋薄膜及其制备方法 |
-
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- 2021-10-26 CN CN202111251504.7A patent/CN113913935B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103839928A (zh) * | 2014-03-05 | 2014-06-04 | 欧阳俊 | 一种高耐压、低漏电、高极化强度铁酸铋薄膜及其制备方法 |
CN106835052A (zh) * | 2017-04-16 | 2017-06-13 | 北京工业大学 | 利用射频磁控溅射工艺制备BiFeO3薄膜阻变存储器的方法 |
CN109161847A (zh) * | 2018-08-09 | 2019-01-08 | 华南师范大学 | 镓掺杂铁酸铋超四方相外延薄膜及其制备方法和应用 |
CN110289352A (zh) * | 2019-05-24 | 2019-09-27 | 华南师范大学 | 低铁电极化翻转电压的四方相铁酸铋薄膜及其制备方法 |
Non-Patent Citations (1)
Title |
---|
SAJ MOHAN M M ET AL.: "Template assisted strain tuning and phase stabilization in epitaxial BiFeO3 thin films", 《,AMERICAN INSTITUTE OF PHYSICS》, vol. 1942, pages 1 * |
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