| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-resolution and low-noise magnetic reproducing head capable of dealing with a hard disk having a terabit class surface recording density. SOLUTION: A current is supplied from a fixed layer 102 where magnetization is fixed by an antiferromagnetic member 103 to a nonmagnetic thin line 101 having a part N1 affected by an external magnetic field and a part N2 not affected by the external magnetic field to store spin-polarized electrons (I<SB>s1</SB>, I<SB>s2</SB>) in the nonmagnetic thin line 101. The distance L of voltage terminals is shorter than the spin extension length of the nonmagnetic thin line 101. The spin electron I<SB>s1</SB>is modulated by fluctuations of the external magnetic field, but the spin electron I<SB>s2</SB>is not modulated by that. Thus, a potential difference dependent on the external magnetic field is generated between the parts N1 and N2, and the potential difference is measured by a voltmeter 104. COPYRIGHT: (C)2009,JPO&INPIT
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