FILM TO BE FIXED AND ITS FORMATION METHOD AND SPIN VALVE STRUCTURE AND ITS FORMING METHOD

PROBLEM TO BE SOLVED: To provide a spin valve structure that can secure excellent stability corresponding to high-density recording, and to provide a method for forming the spin valve structure. SOLUTION: A pinned layer 35 is provided, and has a five-layer configuration where a cobalt iron alloy(CoF...

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Bibliographische Detailangaben
Hauptverfasser:	SEI SHUKO, KAN CHURYO, MIN KI, NYO EIDO, KOKU KYOSHU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MAGNETS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TESTING TRANSFORMERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a spin valve structure that can secure excellent stability corresponding to high-density recording, and to provide a method for forming the spin valve structure. SOLUTION: A pinned layer 35 is provided, and has a five-layer configuration where a cobalt iron alloy(CoFe) layer 21, a ruthenium(Ru) layer 22, a cobalt iron alloy layer 23, a nickel chrome alloy(NiCr) layer 24, and a cobalt iron alloy layer 25 are laminated in this turn. Especially, the spin valve structure is composed so that thickness γ of the cobalt iron alloy layer 25 becomes approximately 1/2 times larger than that β in the cobalt iron alloy layer 23 (γ=1/2.β), and at the same time total β+γ of the thickness of the cobalt iron alloy layers 23 and 25 become smaller than thickness α of the cobalt iron alloy layer 21 ((β+γ)