- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

摘要

如何避免界面反应、可靠地提取材料的自旋极化率是自旋电子学的一个基本问题. 本文选取了一种独特的铁磁性层状过渡族金属硫化物Fe _0.26TaS ₂, 研究了单晶材料的磁性、电子输运和Andreev反射谱. 磁性和输运结果表明, 低温下Fe _0.26TaS ₂单晶存在强磁各向异性、双峰磁电阻和反常霍尔效应. 通过干法转移方案制备的干净界面的Fe _0.26TaS ₂超导异质结的Andreev反射谱, 发现该材料的自旋极化率为47% ± 7%. 本文展示的干法转移制备超导/磁性异质结的方法可广泛用于测量各种二维磁性材料的自旋极化率.

关键词:

Abstract

An elementary mission of spintronics research is to prevent the interface reacting in spin device and extract spin polarization of ferromagnetic material reliably. Layered transition metal sulfide has very strong anisotropic magnetism, magnetoresistance, and unique Hall effect. It provides a good platform for studying the magnetic order related physical phenomena and may lay a foundation for spintronic applications. In this work, the magnetism, electronic transport and Andreev reflection spectrum of a novel ferromagnetic material Fe _0.26TaS ₂with a layers-stacked structure are measured. Strong magnetic anisotropy, double-peak magnetoresistance and anomalous Hall effect are found. In the magnetic measurement, the strong magnetic anisotropy behavior in Fe _0.26TaS ₂single crystal is observed. Curie temperature T _Cof the Fe _0.26TaS ₂single crystal is confirmed by zero field cooling, field cooling and Arrot plot. The electronic transport in the Fe _0.26TaS ₂single crystal also reveals strong anisotropic behaviors, such as butterfly-like magnetoresistance and obvious anomalous hall effect below T _C. To obtain the spin polarization of Fe _xTaS ₂, we fabricate an Fe _xTaS ₂/superconductor Andreev junction to measure the spin polarization that is fitted by the modified Blonder-Tinkham-Klapwijk (BTK) theory. Perhaps the diffusion of Pb can form an alloy structure, creating another superconductor behavior. The two-gap BTK theory confirms our hypothesis, and the result spin polarization can reach 26%. To avoid the interference from Pb alloy superconductor, we also fabricate an Fe _0.26TaS ₂/Al/Pb superconductor junction by evaporating Al and then Pb film on the surface of Fe _0.26TaS ₂in sequence. The results of BTK fit show that the spin polarization from the first technical route cannot be reliable due to the tunneling layer on the Al interface. In order to obtain a clean interface, Fe _0.26TaS ₂/NbSe ₂junction is fabricated through mechanical-exfoliation and dry-transfer method. Through the Andreev reflection spectrum of this junction, the spin polarization of Fe _0.26TaS ₂is extracted to be 47% ± 7%. For various two-dimensional ferromagnetic materials, our work suggests that the dry-transfer method is well applicable in spin polarization extraction. The results of spin polarization indicate that the Fe _0.26TaS ₂is a promising candidate of next-generation material of spintronics.

Keywords:

作者及机构信息

1.
2.
3.
4.

通信作者:徐同帅,xutongshuai@iphy.ac.cn

基金项目:国家自然科学基金(批准号: 61425015, 11704006)、中国科学院B类战略性先导科技专项(批准号: XDB28000000)和国家重点研发计划(批准号: 2016YFA0300600)资助的课题

Authors and contacts

1.
2.
3.
4.

Corresponding author:Xu Tong-Shuai,xutongshuai@iphy.ac.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant Nos 61425015, 11704006), the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000), and the National Key Research and Development Program of China (Grant No. 2016YFA0300600)

文章全文: translate this paragraph

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

施引文献

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

[1]	王少霞, 赵旭才, 潘多桥, 庞国旺, 刘晨曦, 史蕾倩, 刘桂安, 雷博程, 黄以能, 张丽丽.过渡金属(Cr, Mn, Fe, Co)掺杂对TiO₂磁性影响的第一性原理研究. 必威体育下载 , 2020, 69(19): 197101.doi:10.7498/aps.69.20200644
[2]	王宗, 侯兴元, 潘伯津, 谷亚东, 张孟迪, 张凡, 陈根富, 任治安, 单磊.Re₃W的点接触安德烈夫反射谱研究. 必威体育下载 , 2019, 68(1): 017402.doi:10.7498/aps.68.20181996
[3]	杨芝, 张悦, 周倩倩, 王玉华.Fe3O4单晶薄膜磁性电场调控的微磁学仿真研究. 必威体育下载 , 2017, 66(13): 137501.doi:10.7498/aps.66.137501
[4]	刘红艳, 柳祝红, 李歌天, 马星桥.Ga含量对Mn2-xNiGa1+x结构和磁性的影响. 必威体育下载 , 2016, 65(4): 048102.doi:10.7498/aps.65.048102
[5]	姜恩海, 朱兴凤, 陈凌孚.Heusler合金Co2MnAl(100)表面电子结构、磁性和自旋极化的第一性原理研究. 必威体育下载 , 2015, 64(14): 147301.doi:10.7498/aps.64.147301
[6]	姜丽娜, 张玉滨, 董顺乐.有机自旋器件磁性渗透层中双极化子对自旋极化输运的影响. 必威体育下载 , 2015, 64(14): 147104.doi:10.7498/aps.64.147104
[7]	杨育奇, 高庆庆, 李冠男.组合结构化合物Ho2Ni7-xFex (x=03.0)的晶体结构、结构转变和磁性. 必威体育下载 , 2013, 62(1): 016103.doi:10.7498/aps.62.016103
[8]	王瑞琴, 宫箭, 武建英, 陈军.对称双势垒量子阱中自旋极化输运的时间特性. 必威体育下载 , 2013, 62(8): 087303.doi:10.7498/aps.62.087303
[9]	杜音, 王文洪, 张小明, 刘恩克, 吴光恒.铁基Heusler合金Fe2Co1-xCrxSi的结构、磁性和输运性质的研究. 必威体育下载 , 2012, 61(14): 147304.doi:10.7498/aps.61.147304
[10]	赵昆, 张坤, 王家佳, 于金, 吴三械.Heusler合金Pd2 CrAl四方变形、磁性及弹性常数的第一性原理计算. 必威体育下载 , 2011, 60(12): 127101.doi:10.7498/aps.60.127101
[11]	罗礼进, 仲崇贵, 方靖淮, 赵永林, 周朋霞, 江学范.Heusler合金Mn2 NiAl的电子结构和磁性对四方畸变的响应及其压力响应. 必威体育下载 , 2011, 60(12): 127502.doi:10.7498/aps.60.127502
[12]	高潭华, 卢道明, 吴顺情, 朱梓忠.Fe原子薄片的磁性:第一性原理计算. 必威体育下载 , 2011, 60(4): 047502.doi:10.7498/aps.60.047502
[13]	何志刚, 程兴华, 龚敏, 蔡娟露, 石瑞英.影响磁性pn结自旋极化输运特性的因素. 必威体育下载 , 2010, 59(9): 6521-6526.doi:10.7498/aps.59.6521
[14]	韩立安, 陈长乐, 董慧迎, 王建元, 高国棉, 罗炳成.层状钙钛矿La1.3Sr1.7Mn2-xCuxO7的磁性及电特性. 必威体育下载 , 2008, 57(1): 541-544.doi:10.7498/aps.57.541
[15]	韩薇, 常树全, 戴耀东, 陈达, 黄彦君.氰根桥联Ni(Ⅱ)-Fe(Ⅲ)类纳米分子磁体磁性及穆斯堡尔谱研究. 必威体育下载 , 2008, 57(4): 2493-2499.doi:10.7498/aps.57.2493
[16]	刘锦宏, 张凌飞, 田庚方, 李济晨, 李发伸.低温固相反应法制备的NiFe2O4纳米颗粒的结构与磁性. 必威体育下载 , 2007, 56(10): 6050-6055.doi:10.7498/aps.56.6050
[17]	庞利佳, 孙光飞, 陈菊芳, 强文江, 张锦标, 黎文安.纳米晶复合Pr2Fe14B/α-Fe永磁材料磁性的研究. 必威体育下载 , 2006, 55(6): 3049-3053.doi:10.7498/aps.55.3049
[18]	张炜, 千正男, 隋郁, 刘玉强, 苏文辉, 张铭, 柳祝红, 刘国栋, 吴光恒.Heusler合金Co2TiSn的磁性与输运性能. 必威体育下载 , 2005, 54(10): 4879-4883.doi:10.7498/aps.54.4879
[19]	王本阳, 千正男, 隋郁, 刘玉强, 苏文辉, 张铭, 柳祝红, 刘国栋, 吴光恒.Heusler合金Cu2VAl磁性及输运性质的研究. 必威体育下载 , 2005, 54(7): 3386-3390.doi:10.7498/aps.54.3386
[20]	郭鸿涌, 刘宝丹, 唐宁, 罗鸿志, 李养贤, 杨伏明, 吴光恒.Co和稳定元素对Nd3(Fe,Co,M)29(M=Ti,V,Cr) 化合物结构和磁性的影响. 必威体育下载 , 2004, 53(1): 189-193.doi:10.7498/aps.53.189

计量

文章访问数:9493
PDF下载量:223
被引次数:0

搜索

留言板