Fabrication and electrical properties of lapped type of TMR heads for ∼50 Gb/in/sup 2/ and beyond

Araki, S.; Sato, Kazuki; Kagami, T.; Saruki, S.; Uesugi, Takumi; Kasahara, N.; Kuwashima, T.; Ohta, N.; Sun, J. J.; Nagai, K.; Li, Shuxiang; Hachisuka, N.; Hatate, H.; Kagotani, T.; Takahashi, Norio; Ueda, Keigo; Matsuzaki, M.

doi:10.1109/tmag.2002.988914

Cited by 39 publications

(13 citation statements)

References 26 publications

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“…However, in most of the cases theories were limited to specific problems where intricate structures at the interfaces were simplified. Until now, EB effects have been exploited in several technological applications such as read head of recording devices [39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54], magnetoresistive random access memories (MRRAM) [55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76] and it has been proposed for the technological applications in stabilizing magnetization of superparamagnetic nanoparticles [77,78,79,80] or to improve coercivity and energy product of the permanent magnets [81,82,83,84].…”

Section: Introductionmentioning

confidence: 99%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

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Abstract. The phenomenology of exchange bias effects observed in structurally single-phase alloys and compounds but composed of a variety of coexisting magnetic phases such as ferromagnetic, antiferromagnetic, ferrimagnetic, spin-glass, clusterglass, disordered magnetic states are reviewed. The investigations on exchange bias effects are discussed in diverse types of alloys and compounds where qualitative and quantitative aspects of magnetism are focused based on macroscopic experimental tools such as magnetization and magnetoresistance measurements. Here, we focus on improvement of fundamental issues of the exchange bias effects rather than on their technological importance.

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Section: Introductionmentioning

confidence: 99%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

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“…The increase in reading data rate and reduction in head noise are the pre-requisites for the use of magnetic tunnel junctions (MTJs) in read head sensors for high-density recording media [1][2][3]. This purpose is achieved by using ultra-thin tunnel barriers between two ferromagnetic electrodes.…”

Section: Introductionmentioning

confidence: 99%

Study of MgO tunnel barriers with conducting atomic force microscopy

Bhutta¹,

Schmalhorst²,

Reiss³

2009

Journal of Magnetism and Magnetic Materials

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“…[15][16][17][18] In order to develop the excellent properties for GMR and TMR devices, however, the investigations on fundamental magnetic properties for these practical antiferromagets have been highly desired, because the exchange biasing characteristics are closely related to the spin structures, magnetocrystalline anisotropy energy (MAE) and the magnitude of T N of the antiferromagnetic materials. [19][20][21] In addition, recent interest is how to design the devices with a low electrical resistance at room temperature, 22,23) especially in the current perpendicular to the plane (CPP)-type spin valves.…”

Section: Introductionmentioning

confidence: 99%

Electrical and Magnetic Properties, and Electronic Structures of Pseudo-Gap-Type Antiferromagnetic <I>L</I>1<SUB>0</SUB>-Type MnPt Alloys

2006

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The electrical resistivity &, magnetic susceptibility 1, electronic specific heat coefficient e , the Néel temperature T N and the electronic structure and the magnetocrystalline anisotropy energy (MAE) have been investigated for L1 0 -type MnPt alloy system. This alloy system exhibits the characteristic behaviors of pseudo-gap type antiferromagnets, presenting with the highest T N , the smallest values of &, 1 and e in the vicinity of the equiatomic composition. The values of &, 1 and e increase with deviating from the equiatomic composition.From the linear muffin-tin orbital (LMTO) band calculations, the L1 0 -type MnPt alloy system has a pseudo-gap in the electronic structure and the density of states (DOS) at the Fermi energy (E F ) is lowest at the equiatomic composition in accord with the experimental results. Furthermore, the results of the LMTO band calculations including the spin-orbit interaction make it clear that the direction of the magnetic moment of Mn in the equiatomic composition is parallel to the c-axis, consistent with the reported spin structure determined by neutron diffractions. The magnetocrystalline anisotropy constant K is about 1:39 Â 10 6 J m À3 which is larger in magnitude than that of L1 0 -type MnNi equiatomic alloy, though the signs are different.

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Fabrication and electrical properties of lapped type of TMR heads for ∼50 Gb/in/sup 2/ and beyond

Cited by 39 publications

References 26 publications

Exchange bias effect in alloys and compounds

Exchange bias effect in alloys and compounds

Study of MgO tunnel barriers with conducting atomic force microscopy

Electrical and Magnetic Properties, and Electronic Structures of Pseudo-Gap-Type Antiferromagnetic <I>L</I>1<SUB>0</SUB>-Type MnPt Alloys

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