TITLE

Coherent magnetic reversal in half-metallic manganite tunnel junctions

AUTHOR(S)
Jo, Moon-Ho; Moon-Ho Jo; Mathur, N. D.; Mathur, N.D.; Evetts, J. E.; Evetts, J.E.; Blamire, M. G.; Blamire, M.G.
PUB. DATE
December 2000
SOURCE
Applied Physics Letters;12/4/2000, Vol. 77 Issue 23
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report coherent magnetization reversal in the La[sub 0.7]Ca[sub 0.3]MnO[sub 3]/NdGaO[sub 3]/La[sub 0.7]Ca[sub 0.3]MnO[sub 3] tunnel junctions probed by spin-polarized tunneling. The junction resistance shows an extremely sharp switching with distinct binary resistances and its two-dimensional angular dependence reveals two different magnetic anisotropies in play in the top and bottom La[sub 0.7]Ca[sub 0.3]MnO[sub 3] electrodes. The large bottom electrode (50x2000 μm) shows the effective twofold crystalline anisotropy and the top electrode (6x6 μm) shows an additional fourfold anisotropy. The geometrical expression of the switching fields in two-dimensional polar coordinates provides evidence that the coherent magnetization reversal of the junctions, particularly the top electrode, closely resembles the ideal coherent rotation model. © 2000 American Institute of Physics.
ACCESSION #
4413069

 

Related Articles

  • Critical Dynamics of Homogeneous Magnetization above T[sub c] in Nd[sub 0.77]Ba[sub 0.23]MnO[sub 3] Single Crystals. Luzyanin, I. D.; Khavronin, V. P.; Ryzhov, V. A.; Larionov, I. I.; Lazuta, A. V. // JETP Letters;4/10/2001, Vol. 73 Issue 7, p327 

    The behavior of the linear and nonlinear dynamic susceptibilities of a Nd[sub 0.77]Ba[sub 0.23]MnO[sub 3] single crystal is studied with the aim to verify whether sealing theory is applicable for describing the critical phenomena in manganites with cubic symmetry. The experimental results...

  • Magnetocaloric effect in La0.67Ca0.33MnOδ and La0.60Y0.07Ca0.33MnOδ bulk materials. Zhang, X. X.; Tejada, J.; Xin, Y.; Sun, G. F.; Wong, K. W.; Bohigas, X. // Applied Physics Letters;12/2/1996, Vol. 69 Issue 23, p3596 

    The dependence of magnetization on the applied magnetic field and temperature was measured carefully near their Curie temperatures for two perovskite manganite samples: La0.67Ca0.33MnOδ and La0.60Y0.07Ca0.33MnOδ. It is suggested by the results that these materials can be utilized as both...

  • Anomalous increase of resistivity against thermal cycling in some of the phase separated manganites. Mahendiran, R.; Maignan, A.; Hervieu, M.; Martin, C.; Raveau, B. // Journal of Applied Physics;9/1/2001, Vol. 90 Issue 5 

    We investigate the effect of repeated thermal cycles in some of the Pr[sub 0.5]Ca[sub 0.5]Mn[sub 1-x]M[sub x]O[sub 3] (M=Cr, Co, and Ni and x=0.02–0.05) compounds which undergo a spontaneous (H=0 T) insulator to metal transition below the temperature T[sub p] driven by percolation of...

  • Magnetic phase transitions in the system La[sub 1-x]Bi[sub x]MnO[sub 3+λ]. Troyanchuk, I. O.; Mantytskaja, O. S.; Szymczak, H.; Shvedun, M. Yu. // Low Temperature Physics;Jul2002, Vol. 28 Issue 7, p569 

    The crystal structure and magnetic properties of the La[sub 1-x]Bi[sub x]MnO[sub 3 + λ] system (0 ≤ x ≤ 1; λ ≤ 0.08) are studied as functions of the oxygen and bismuth contents. In oxidized samples La[sub 1-x]Bi[sub x]MnO[sub 3 + λ] a phase transition from a...

  • Linear and Nonlinear Susceptibilities of Samarium Manganites. Luzyanin, I. D.; Ryzhov, V. A.; Dunaevskiı, S. M.; Khavronin, V. P.; Larionov, I. I.; Lazuta, A. V.; Chernenkov, Yu. P. // Physics of the Solid State;Feb2000, Vol. 42 Issue 2, p298 

    The temperature and field behaviors of the linear and nonlinear responses to a weak ac magnetic field in the Sm[sub 1 - x]Sr[sub x]MnO[sub 3] manganites with x = 0.25, 0.3, and 0.4 have been investigated. It is found that the hysteresis of the second harmonic of magnetization in the dc magnetic...

  • Magnetic properties lithium-doped manganite single crystals. Barilo, S. N.; Bychkov, G. L.; Gatalskaya, V. I.; Kurochkin, L. A.; Sokol, V. P.; Szymczak, H.; Szymczak, R.; Baran, M. // Low Temperature Physics;Apr2001, Vol. 27 Issue 4, p288 

    Magnetic and resistivity properties of La[sub 1-x]Li[sub x]MnO[sub 3] single crystals with the perovskite structure at lithium concentrations x=0.06 and 0.2 are investigated over a broad temperature range at fields of up to 50 kOe. The Curie temperature is T[sub C]=90 K (x=0.06) and 300 K...

  • Separation of Magnetic Phases in La[sub 1 � ][sub x]Ca[sub x]MnO[sub 3] Manganites with 0.6=x=0.9. Arbuzova, T. I.; Smolyak, I. B.; Naumov, S. V.; Samokhvalov, A. A.; Korolev, A. V. // Journal of Experimental & Theoretical Physics;Jan2001, Vol. 92 Issue 1, p100 

    The magnetic properties of La[sub 1-x]Ca[sub x]MnO[sub 3] solid solutions were studied in wide temperature and magnetic field ranges, T = 2-600 K and H = 50 kOe. Semiconducting compositions with 0.6 < x < 0.9 exhibited an unusual temperature behavior of magnetization and susceptibility with...

  • Phase transitions of MnO[sub 3] compounds revealed by nonlinear magnetooptics. Fiebig, M. // Applied Physics B: Lasers & Optics;2002, Vol. 74 Issue 7/8, p749 

    Magnetic second-harmonic generation (SHG) and three-photon difference-frequency generation (DFG) are used to investigate the magnetic phase diagrams of MnO[sub 3] [sup 3-] compounds with five- and sixfold coordination of the Mn[sup 3+] (3d[sup 4] ) ion. In the hexagonal manganites, the six basic...

  • Competition between ferromagnetic metallic and paramagnetic insulating phases in manganites. Li, G.; Zhou, H.-D.; Feng, S. J.; Fan, X.-J.; Li, X.-G.; Wang, Z. D. // Journal of Applied Physics;8/1/2002, Vol. 92 Issue 3, p1406 

    La[sub 0.67]Ca[sub 0.33]Mn[sub 1-χ]Cu[sub χ]O[sub 3] (χ = 0 and 0.15) epitaxial thin films were grown on the (100) LaAlO[sub 3] substrates, and the temperature dependence of their resistivity was measured in magnetic fields up to 12 T by a four-probe technique. We found that the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics