US5728481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin interaction device
Assignee: Hitachi Ltd
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Filing: 1995-06-06
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Granted: 1998-03-17
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Expires: 2015-06-06
Abstract
Abstract A magnetic detecting device is constructed of a substrate, a first magnetic layer formed on the substrate, a first magnetic layer formed on the substrate, an intermediate layer containing an atom indicative of weak spincoupling and formed on the first magnetic film, and a second magnetic layer formed on the intermediate layer. The magnetic detecting device further comprises a unit or supplying a current through the first and second magnetic layers, and a unit for detecting a voltage generated between the first magnetic layer and the second magnetic layer while the current is supplied thereto.
Inventors
- 👤 Masahiro Kasai
- 👤 Yuzo Kozono
- 👤 Yoko Kanke
- 👤 Toshiyuki Ohno
- 👤 Masanobu Hanazono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:52
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/32; H01F10/3213; B; B82; B82Y; B82Y25/00; G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/09; G01R33/093; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/11; Y10T428/1107; Y10T428/1121
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; wherein a value of a magnetic field applied to said laminated film is measured by detecting a change of a value of resistance of said laminated film to detect a value of magnetic field.
Claim 2
Dependent Claim
66 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; wherein a value of a magnetic field applied to said laminated film is measured by detecting a change of a value of resistance of said laminated film to detect a value of magnetic field.
Claim 3
Dependent Claim
283 words
A magnetic detecting device as claimed in claim 1, wherein said magnetic films of perovskite structure are made of a material selected from the group consisting of (La,Ca) 1 Mn 1 O y , (La,Sr) 1 Mn 1 O y , Bi 1 Mn 1 O y , Ba 1 Fe 1 O y , Sr 1 Co 1 O y , (La,A) 1 B 1 O y (symbol "A" indicates at least one of elements Ba, Sr, Pb, Cd; symbol "B" indicates at least one of elements Mn, Co); (La,A) 1 B 1 C 1 O y (symbol "A" indicates at least one rare-earth element; symbol "B" is at least one alkaline-earth element; symbol "C" is at least one of elements Fe, Co, Mn, Ni, Cr, Co); {(Pr,Nd),(Ba,Sr)} 1 Mn 1 O y , (Bi,Ca) 1 Mn 1 O y , La 1 (N,Mn) 1 O y (symbol "M" indicates at least one of elements Co, Ni, Cu, Cr); Gd(Co,Mn) 1 O y , A 1 (Fe,B) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, symbol "B" is at least one of elements Mo, Mn); Bi 1 Cr 1 O y , Ca 1 Ru 1 O y ; A 1 (B,C) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, Pb, symbol "B" is at least one of elements Ni, Mn, Cr, Fe, symbol "C" is at least one of elements W, Sb, Mo, U); and (Sr, La) 1 (C,D) 1 O y (symbol "C" is at least one of elements Co, Ni, symbol "D" is at least one of elements Nb, Sb, Ta, symbol "y" is 2.7 to 3.3).
Claim 4
Dependent Claim
326 words
A magnetic detecting device as claimed in claim 2, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 , Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , Tl 1 Ba 2 Ca 1 Cu 2 O 6 , Tl 1 Ba 2 Ca 3 Cu 4 O 8 , Tl 1 Ba 3 Ca 2 Cu 4 O 10 , Tl 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 1 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 5
Dependent Claim
325 words
A magnetic detecting device as claimed in claim 1, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 ,Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , Tl 1 Ba 2 Ca 1 Cu 2 O 6 , TI 1 Ba 2 Ca 3 Cu 4 O 8 , T 1 Ba 3 Ca 2 Cu 4 O 10 , Tl 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 1 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 6
Dependent Claim
84 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; a current source for applying a current between said magnetic films; and a voltage detector for detecting a voltage generated between said magnetic films; wherein a value of magnetic field applied to said laminated film is measured by a value of a voltage generated between said magnetic films to detect magnetic field.
Claim 7
Dependent Claim
84 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; a current source for applying a current between said magnetic films; and a voltage detector for detecting a voltage generated between said magnetic films; wherein a value of magnetic field applied to said laminated film is measured by a value of a voltage generated between said magnetic films to detect magnetic field.
Claim 8
Dependent Claim
283 words
A magnetic detecting device as claimed in claim 5, wherein said magnetic films of perovskite structure are made of a material selected from the group consisting of (La,Ca) 1 Mn 1 O y , (La,Sr) 1 Mn 1 O y , Bi 1 Mn 1 O y , Ba 1 Fe 1 O y , Sr 1 Co 1 O y , (La,A) 1 B 1 O y (symbol "A" indicates at least one of elements Ba, Sr, Pb, Cd; symbol "B" indicates at least one of elements Mn, Co); (La,A) 1 B 1 C 1 O y (symbol "A" indicates at least one rare-earth element; symbol "B" is at least one alkaline-earth element; symbol "C" is at least one of elements Fe, Co, Mn, Ni, Cr, Co); {(Pr,Nd),(Ba,Sr)} 1 Mn 1 O y , (Bi,Ca) 1 Mn 1 O y , La 1 (N,Mn) 1 O y (symbol "M" indicates at least one of elements Co, Ni, Cu, Cr); Gd(Co,Mn) 1 O y , A 1 (Fe,B) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, symbol "B" is at least one of elements Mo, Mn); Bi 1 Cr 1 O y , Ca 1 Ru 1 O y ; A 1 (B,C) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, Pb, symbol "B" is at least one of elements Ni, Mn, Cr, Fe, symbol "C" is at least one of elements W, Sb, Mo, U); and (Sr, La) 1 (C,D) 1 O y (symbol "C" is at least one of elements Co, Ni, symbol "D" is at least one of elements Nb, Sb, Ta, symbol "y" is 2.7 to 3.3).
Claim 9
Dependent Claim
326 words
A magnetic detecting device as claimed in claim 6, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 , Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , Tl 1 Ba 2 Ca 1 Cu 2 O 6 , Tl 1 Ba 2 Ca 3 Cu 4 O 8 , Tl 1 Ba 3 Ca 2 Cu 4 O 10 , TI 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 1 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 10
Dependent Claim
326 words
A magnetic detecting device as claimed in claim 5, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 , Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , Tl 1 Ba 2 Ca 1 Cu 2 O 6 , Tl 1 Ba 2 Ca 3 Cu 4 O 8 , Tl 1 Ba 3 Ca 2 Cu 4 O 10 , Tl 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 0 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 11
Dependent Claim
94 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; a current source for applying a current to one of said magnetic films; a voltage detector for detecting a voltage generated within said one of said magnetic films by said current; wherein a value of magnetic field applied to said laminated film is measured by a value of a voltage generated within said one of said magnetic films to detect magnetic field.
Claim 12
Dependent Claim
94 words
A magnetic detecting device comprising: a substrate; a laminated film formed on said substrate and comprising an oxide film of perovskite structure and magnetic films of perovskite structure sandwiching said oxide film; a current source for applying a current to one of said magnetic films; a voltage detector for detecting a voltage generated within said one of said magnetic films by said current; wherein a value of magnetic field applied to said laminated film is measured by a value of a voltage generated within said one of said magnetic films to detect magnetic field.
Claim 13
Dependent Claim
282 words
A magnetic detecting device as claimed in claim 9, wherein said magnetic films of perovskite structure are made of a material selected from the group consisting of (La,Ca) 1 Mn 1 O y , (La,Sr) 1 Mn 1 O y , Bi 1 Mn 1 O y , Ba 1 Fe 1 O y , Sr 1 Co 1 O y , (La,A) 1 B 1 O y (symbol "A" indicates at least one of elements Ba, Sr, Pb, Cd; symbol "B" indicates at least one of elements Mn, Co); (La,A) 1 B 1 C 1 O y (symbol "A" indicates at least one rare-earth element; symbol "B" is at least one alkaline-earth element; symbol "C" is at least one of elements Fe, Co, Mn, Ni, Cr, Co); {(Pr,Nd),(Ba,Sr)} 1 Mn 1 O y , (Bi,Ca) 1 Mn 1 O y , La 1 (N,Mn) 1 O y (symbol "M" indicates at least one of elements Co, Ni, Cu, Cr); Gd(Co,Mn) 1 O y , A 1 (Fe,B) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, symbol "B" is at least one of elements Mo, Mn); Bi 1 Cr 1 O y , Ca 1 Ru 1 O y ; A 1 (B,C) 1 O y (symbol "A" is at least one of elements Ba, Ca, Sr, Pb, symbol "B" is at least one of elements Ni, Mn, Cr, Fe, symbol "C" is at least one of elements W, Sb, Mo, U); and (Sr,La) 1 (C,D) 1 O y (symbol "C" is at least one of elements Co, Ni, symbol "D" is at least one of elements Nb, Sb, Ta, symbol "y" is 2.7 to 3.3).
Claim 14
Dependent Claim
326 words
A magnetic detecting device as claimed in claim 10, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 , Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , TI 1 Ba 2 Ca 1 Cu 2 O 6 , Tl 1 Ba 2 Ca 3 Cu 4 O 8 , Tl 1 Ba 3 Ca 2 Cu 4 O 10 , TI 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 1 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 15
Dependent Claim
326 words
A magnetic detecting device as claimed in claim 9, wherein said oxide film of perovskite structure is made of a material selected from the group consisting of (La 1-x M x )Cu 2 O 4 (symbol "M" is at least one of elements Ba, Ca, Sr), La 1 Ba 2 Cu 3 O 7 , La 2 NaCuO 4 , La 2 CuO 4 , Bi 0 .1 La 1 .8 Sr 0 .1 CuO, La 2 Ba 3 LuCu 6 O, YBa 2 Cu 3 O 7 , Y 2 Ba 4 Ca 8 O 20 , Yb 2 Ba 4 Cu 7 O 15 , Bi 2 Sr 2 CuO 6 , Bi 2 Sr 2 Ca 1 Cu 2 O 8 , B 2 Si 8 Ca 2 Cu 3 O 10 , Bi 2 Sr 2 Ca 3 Cu 4 O 12 , Ba(Pb 1-x Bi x )O 3 , (Ba 1-x K x )BiO 3 , (Bi 1-x Pb x ) 2 Sr 2 Ca 2 Cu 3 O, Bi 2 Sr 2 .6 Nd 0 .4 CuO 8 , Tl 2 Ba 2 CuO 6 , Tl 2 Ba 2 Ca 1 Cu 2 O 8 , Tl 2 Ba 2 Ca 2 Cu 3 O 10 , Tl 1 Ba 2 Ca 1 Cu 2 O 6 , Tl 1 Ba 2 Ca 3 Cu 4 O 8 , Tl 1 Ba 3 Ca 2 Cu 4 O 10 , Tl 1 Sr 2 Ca 2 Cu 3 O 9 , (Tl 0 .5 Pb 0 .5)Sr 2 Ca 2 Cu 3 O 8 , Nd 0 .6 Sr 0 .2 Ce 0 .2 CuO 4 , (Tl 0 .75 Bi 0 .25) 1 .3 (Sr 0 .5 Ca 0 .5) 2 .7 Cu 2 O 8 , and Pb 2 Sr 2 Y 0 .5 Ca 0 .5 Cu 3 O 8 (Symbol "X" is 0.05 to 1.0).
Claim 16
Dependent Claim
37 words
A magnetic recording apparatus comprising a magnetic recording medium and a magnetic detecting device as claimed in claim 1, wherein a magnetic signal recorded in said magnetic recording medium is read out by said magnetic detection device.
References Cited (Backward Citations)
US4883710A
Cited
US5077270A
Cited
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