Development of High T_C SQUID Magnetometer Systm
Development of High T_C SQUID Magnetometer Systm
批准号:
08650496
负责人:
ENPUKU Keiji
金额:
$1.41万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
1996
资助国家:
日本
项目状态:
已结题
起止时间:
1996 至 1997
中文摘要
在本项目中,我们利用高T_C超导体开发了超导量子干涉器件(SQUID)。首先,明确了研制高性能SQUID磁强计的要求。结果表明,josephson结的临界ctqrenti_o和电阻R应为I_O=20muA, R= 10omegaat T=77K, SQUID电感应为L=50-I50pH。当满足这些要求时,我们可以期望磁场分辨率为B_n=20 fT/Hz^</2>的高性能磁强计。为了满足这些要求,我们开发了在SrTiO_3双晶衬底上制造的约瑟夫森结。发现双晶衬底的最佳取向角为30度。利用30度衬底,我们首次成功地实现了I_o=20 muA, R=10 OMEGA的约瑟夫森效应。我们还表明,在这种情况下,在T=77K下工作的SQUID的性能得到了显着改善。与传统的squid相比,从30度双晶结获得的性能非常好。还开发了所谓的直接耦合SQUID磁力计,其中拾取线圈和100-pH SQUID集成在1cmx1cm的SrTiO_3衬底上。测得磁强计的磁场分辨率为B_nn=30 fT/Hz^</2n>fT/Hz^<1/2>,与设计值接近。该值是直接耦合SQUID磁力计迄今为止报道的最低值,足以测量心脏磁图。
英文摘要
In this project, we have developed superconducting quantum interference device (SQUID) using high T_C supercnductors. First, we clarify requirements for the development of high performance SQUID magnctometer. We show that the critical ctqrrentI_O and the resistance R of the Josephsonjunction should be I_O=20muA and R=10 OMEGAat T=77K,and the SQUID inductance shouldbe L=50-I50pH.When these requiremts are satisfied, we can expect high prformance magnetometer with magnetic fild resolution of B_n=20 fT/Hz^</2>.In order to satisfy these requirements, we have developedd Josephson junctions fabricated on SrTiO_3 bicrystal substrates. Optimum value of the misorientation angle of the bicrystal substrate has been found be 30 dbgrees. Using the 30 degree substrate, we have succeeded, for the first time, in rcalizing the Josephson jucticn with I_o=20 muA and R=10 OMEGA. We have also shovm tnt the pcrformance of the SQUID operating at T=77K is significantly improved in this case. The performance obtained from the 30 degree bicrystal junction is cxtremely good when compared to the conventional SQUIDs.The so- called directly-couled SQUID magnetometer has been also developed, where pickup coil snd 100-pH SQUID are integrated on 1cmx1cm SrTiO_3 substrate. The magutic field rcsolution of the magnetometer was measured to be B_nn=30 fT/Hz^</2n>fT/Hz^<1/2>, which is close to the dcsign value. This value is the lowestvalue rcprted so far in the directly-coupled SQUID magnetometer, and is enough for the meauresment of magnetocardiogram.
期刊论文(31)
专著(0)
科研奖励(0)
会议论文
登录
查看更多内容
K.Enpuku: "Effect of large dielectric constant of STO substrate on the characteristics of high Tc dc superconducting quantum interference device" Journal of Applied Physics. 80. 1207-1213 (1996)
K.Enpuku:“STO衬底大介电常数对高温直流超导量子干涉器件特性的影响”应用物理学杂志。
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
T.Kiss, K.Enpuku, T.Matsumura, Y.Iriyama, T.Nakamura and M.Takeo: "Laser deposition of YBa_2Cu_3O_<7-x>-SrTiO_3-YBa_2Cu_3O_<7-x> multilayrs utilizing the 4th harmonics of Nd : YAG pulse laser" IEICE Transactions on Electronics. vol.E79-C. 1269-1273 (1996)
T.Kiss、K.Enpuku、T.Matsumura、Y.Iriyama、T.Nakamura 和 M.Takeo:“利用 Nd 的四次谐波激光沉积 YBa_2Cu_3O_<7-x>-SrTiO_3-YBa_2Cu_3O_<7-x> 多层膜
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
K.Enpuku: "Resonant characteristics of high Tc dc SQUID" IEEE Trans. Appl. Supercond.(予定). (1997)
K. Enpuku:“高 Tc 直流 SQUID 的谐振特性”IEEE Trans。(计划)。
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
T.Kiss: "Laser deposition of YBaCuO-STO-YBaCuO multilayers utilizing the 4th harmonics of Nd:YAG pulse laser" IEICE Transactions on Electronics. E79-C. 1269-1273 (1996)
T.Kiss:“利用 Nd:YAG 脉冲激光的四次谐波激光沉积 YBaCuO-STO-YBaCuO 多层”IEICE Transactions on Electronics。
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
K.Enpuku: "Resonant characteristics of high Tc dc SQUID caused by large dielectric constent of SrTiO_3" IEEE Transactions on Applied Superconductivity. Vol.7,no2. 3355-3358 (1997)
K.Enpuku:“SrTiO_3 大介电常数引起的高 Tc dc SQUID 的谐振特性”IEEE 应用超导汇刊。
DOI:
--
发表时间:
期刊:
影响因子:
--
作者:
[]
通讯作者:
共 31 条
Magnetic-field assisted binding method between magnetic markers and targets for biomedical applications
-
批准号:16K14277
-
项目类别:Grant-in-Aid for Challenging Exploratory Research
-
资助金额:$2.33万
-
财政年份:2016
-
负责人:ENPUKU Keiji
-
依托单位:
SQUID pico-voltmeter for highly sensitive measurement system
-
批准号:22656093
-
项目类别:Grant-in-Aid for Challenging Exploratory Research
-
资助金额:$2.28万
-
财政年份:2010
-
负责人:ENPUKU Keiji
-
依托单位:
Liquid-phase detection of biological targets with magnetic markers
-
批准号:21360199
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$11.48万
-
财政年份:2009
-
负责人:ENPUKU Keiji
-
依托单位:
Magnetic Immunoassay system without BF separation for rapid and sensitive detection of biological targets
-
批准号:18360199
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$10.75万
-
财政年份:2006
-
负责人:ENPUKU Keiji
-
依托单位:
Magnetic immunoassay system utilizing magnetic marker and SQUID sensor
-
批准号:15360220
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$9.41万
-
财政年份:2003
-
负责人:ENPUKU Keiji
-
依托单位:
SQUID Microscope System for Biological Immunoassay
-
批准号:12555117
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$8.45万
-
财政年份:2000
-
负责人:ENPUKU Keiji
-
依托单位:
Development of high-frequency current probe utilizing high T_c Josephson junction
-
批准号:12650430
-
项目类别:Grant-in-Aid for Scientific Research (C)
-
资助金额:$2.3万
-
财政年份:2000
-
负责人:ENPUKU Keiji
-
依托单位:
Development of high Tc SQUID magnetometer system for biological application
-
批准号:10650412
-
项目类别:Grant-in-Aid for Scientific Research (C)
-
资助金额:$2.5万
-
财政年份:1998
-
负责人:ENPUKU Keiji
-
依托单位:
Development of high Tc SQUID microscope for biological application
-
批准号:09555128
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$8.32万
-
财政年份:1997
-
负责人:ENPUKU Keiji
-
依托单位:
Development of High Tc SQUID Magnetometer
-
批准号:06650472
-
项目类别:Grant-in-Aid for General Scientific Research (C)
-
资助金额:$1.34万
-
财政年份:1994
-
负责人:ENPUKU Keiji
-
依托单位:
Investigation on Properties of Kinetic Inductance of High T_c Superconducting Thin Films and its Device Application
-
批准号:04650382
-
项目类别:Grant-in-Aid for General Scientific Research (C)
-
资助金额:$1.28万
-
财政年份:1992
-
负责人:ENPUKU Keiji
-
依托单位:
海外基金