75% inverse magnetoresistance at room temperature in Fe4N/MgO/CoFeB magnetic tunnel junctions fabricated on Cu underlayer
作者： Yosuke Komasaki , Masakiyo Tsunoda , Shinji Isogami , Migaku Takahashi
DOI: 10.1063/1.3072827
关键词: Grain size 、 Epitaxy 、 Tunnel magnetoresistance 、 Lattice constant 、 Materials science 、 Wafer 、 Biasing 、 Magnetoresistance 、 Ferromagnetism 、 Condensed matter physics 、 Metallurgy
摘要: Pseudo-single-crystal Cu underlayer (UL) with thermal tolerance was obtained on bare Si wafer by employing a diffusion-blocking layer. Fe4N layer fabricated the UL has an epitaxial relationship and large grain diameter. Magnetic tunnel junctions in stacking sequence of Fe4N/MgO/CoFeB exhibited inverse magnetoresistance (TMR) effect at room temperature. The largest magnitude TMR ratio, −75.1%, bias voltage Vb=−250 mV, where electrons flow from CoFeB to Fe4N. ratio is due improvement crystallinity film because small lattice misfit between Cu.
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Kazuyuki Sunaga, Masakiyo Tsunoda, Kojiro Komagaki, Yuji Uehara, Migaku Takahashi, Inverse tunnel magnetoresistance in magnetic tunnel junctions with an Fe4N electrode Journal of Applied Physics. ,vol. 102, pp. 013917- ,(2007) , 10.1063/1.2753576
C. Tiusan, M. Sicot, M. Hehn, C. Belouard, S. Andrieu, F. Montaigne, A. Schuhl, Fe/MgO interface engineering for high-output-voltage device applications Applied Physics Letters. ,vol. 88, pp. 062512- ,(2006) , 10.1063/1.2172717
Satoshi Kokado, Nobuhisa Fujima, Kikuo Harigaya, Hisashi Shimizu, Akimasa Sakuma, Theoretical analysis of highly spin-polarized transport in the iron nitride Fe 4 N Physical Review B. ,vol. 73, pp. 172410- 172410 ,(2006) , 10.1103/PHYSREVB.73.172410
C. M. Schneider, D. E. Buergler, H. Braak, A. D. Rata, Large inverse tunneling magnetoresistance in Co$_2$Cr$_{0.6}$Fe$_{0.4}$Al/MgO/CoFe magnetic tunnel junctions arXiv: Materials Science. ,(2006) , 10.1063/1.2728034
Thaddeus B Massalski, Hiroaki Okamoto, PRnbsp Subramanian, Linda Kacprzak, William W Scott, None, Binary alloy phase diagrams ASM International. ,vol. 3, pp. 2874- ,(1986)
Howard E. Swanson, Eleanor Tatge, Ruth K. Fuyat, Standard X‐Ray Diffraction Powder Patterns Physics Today. ,vol. 7, pp. 22- 22 ,(1954) , 10.1063/1.3061729
A. D. Rata, H. Braak, D. E. Bürgler, C. M. Schneider, Large inverse tunneling magnetoresistance in Co2Cr0.6Fe0.4Al∕MgO∕Co80Fe20 magnetic tunnel junctions Applied Physics Letters. ,vol. 90, pp. 162512- ,(2007) , 10.1063/1.2728034
Binary and Ternary Interstitial Alloys. I. The Iron-Nitrogen System: The Structures of Fe$_{4}$N and Fe$_{2}$N Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 195, pp. 34- 40 ,(1948) , 10.1098/RSPA.1948.0100
Chin‐An Chang, Formation of copper silicides from Cu(100)/Si(100) and Cu(111)/Si(111) structures Journal of Applied Physics. ,vol. 67, pp. 566- 569 ,(1990) , 10.1063/1.345194
E. T. Krastev, L. D. Voice, R. G. Tobin, Surface morphology and electric conductivity of epitaxial Cu(100) films grown on H-terminated Si(100) Journal of Applied Physics. ,vol. 79, pp. 6865- 6871 ,(1996) , 10.1063/1.361508