Thermomagnetic direct overwrite in TbFe using thermally induced domain wall energy gradient

Rugar, D.; Suits, J. C.; Lin, C.-J.
May 1988
Applied Physics Letters;5/2/1988, Vol. 52 Issue 18, p1537
Academic Journal
A method is described for thermomagnetic direct overwrite in amorphous Tb23 Fe77 . Using long (500 ns) laser pulses, micron-size domains can be written with diameters significantly smaller than the diameter of the Curie temperature isotherm. The relatively small domain size is due to the collapsing effect of the thermally generated domain wall energy gradient. Without switching the magnetic bias field, the domains can be collapsed to submicron size using short (50 ns) laser pulses. Domains can be completely erased by firing short pulses in succession as the recording medium is moved slowly with respect to the optical beam.


Related Articles

  • Thermomagnetic Properties of LaFe11.0Co0.8(Si1–xAlx)1.2 (x = 0, 0.6) Alloys. GĘBARA, P.; PAWLIK, P.; SKORVANEK, I.; MARCIN, J.; PAWLIK, K.; PRZYBYŁ, A.; WYSŁOCKI, J. J.; SZWAJA, M.; FILIPECKA, K. // Acta Physica Polonica, A.;Jul2014, Vol. 126 Issue 1, p166 

    In the present work, Curie temperature, refrigeration capacity and cooling power of the LaFe11.0Co0.8(Si1–xAlx)1.2 (where x = 0, 0.6) alloys, are investigated. The value of Curie temperature was found to be 280 and 290 K for x = 0 and 0.6, respectively. The determined values of cooling...

  • Effect of additional nonmagnetic acceptor doping on the resistivity peak and the Curie temperature of Ga[sub 1-x]Mn[sub x]As epitaxial layers. Yuldashev, Sh. U.; Im, Hyunsik; Yalishev, V. Sh.; Park, C. S.; Kang, T. W.; Lee, Sanghoon; Sasaki, Y.; Liu, X.; Furdyna, J. K. // Applied Physics Letters;2/24/2003, Vol. 82 Issue 8, p1206 

    We have investigated the effect of additional doping by Be on the properties of Ga[SUB1-x]Mn[SUBx]As(x=50.03). For this relatively low value of x, the Curie temperature is observed to increase with increasing Be concentration. We show that the temperature dependence of the resistivity at zero...

  • Role of thermodynamic fluctuations in magnetic recording (invited). Skomski, Ralph // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09B104 

    The thermal stability of the information stored in magnetic recording media is determined by a complex hierarchy. The leading consideration is the static or zero-temperature magnetization reversal complemented by the intrinsic temperature dependence of the micromagnetic parameters. Thermally...

  • Thermomagnetic switching in amorphous rare-earth transition-metal alloys with high compensation temperature. Hansen, P. // Journal of Applied Physics;4/1/1988, Vol. 63 Issue 7, p2364 

    Presents a study which investigated the thermomagnetic switching process in amorphous Tb-FeCo alloys for typical compositions with a Curie temperature of 500 K and compensation temperatures ranging from 360 to 420 K. Temperature and radial dependence of the magnetic parameters; Condition for...

  • Interpretation of Magnetic Anomalies and Estimation of Depth of Magnetic Crust in Slovakia. ROZIMANT, KAMIL; BÜYÜKSARAÇ, AYDIN; BEKTAŞ, ÖZCAN // Pure & Applied Geophysics;Mar2009, Vol. 166 Issue 3, p471 

    The magnetic map of Slovakia used in the paper was compiled as part of a project titled Atlas of Geophysical maps and profiles in 2001. The residual magnetic data were analyzed to produce Curie point estimates. To remove distortion of magnetic anomalies caused by the Earth’s magnetic...

  • Optical Response on the Colossal Magnetoresistance Effect in Manganites. Telegin, A.; Bessonov, V.; Sukhorukov, Y. // Journal of Superconductivity & Novel Magnetism;May2013, Vol. 26 Issue 5, p1437 

    The magnetorefractive effect in magnetoreflection and magnetotransmission modes in the optimally doped manganite epitaxial films possessed the colossal magnetoresistance effect was in the wide spectral region studied. The strict correlation between the magnetorefractive effect and colossal...

  • Effect of a Magnetic Field on the Thermal and Kinetic Properties of the Sm[sub 0.55]Sr[sub 0.45]MnO[sub 3.02] Manganite. Aliev, A. M.; Abdulvagidov, Sh. B.; Batdalov, A. B.; Kamilov, I. K.; Gorbenko, O. Yu.; Amelichev, V. A.; Kaul’, A. R.; Kurbakov, A. I.; Trunov, V. A. // Physics of the Solid State;Jan2003, Vol. 45 Issue 1, p130 

    The temperature and magnetic-field dependences of the heat capacity, thermal conductivity, thermopower, and electrical resistivity of the Sm[SUB0.55]Sr[SUB0.45]MnO[SUB3.02] ceramic material are studied in the temperature range 77-300 K and in magnetic fields up to 26 kOe. It is revealed that the...

  • Decoupling between rare-earth moment and transition metal moment in NdCo[sub 12-x]V[sub x] compounds. Liu, W. F.; Rao, G. H.; Ouyang, Z. W.; Yang, H. F.; Liu, G. Y.; Feng, X. M.; Chang, H.; Liang, J. K. // Applied Physics Letters;6/30/2003, Vol. 82 Issue 26, p4743 

    Single-phase compounds NdCo[SUB12-x]V[SUBx] (x=2.2-2.6) crystallizing in the tetragonal ThMn[SUB12] structure with space group I4/mmm are synthesized. The lattice parameters a and c increase linearly with increasing V content. The Curie temperature of the compounds shows a linear decrease from...

  • Magnetic transition and large low-field magnetoresistance near Curie temperature in polycrystalline La[sub 2/3]A[sub 1/3]MnO[sub 3] (A=Ca,Sr). Li, Run-Wei; Sun, Ji-Rong; Li, Qing-An; Zhu, Tao; Zhang, Shao-Ying; Shen, Bao-Gen // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8092 

    By means of electron spin resonance, magnetization, and resistivity measurements, phase separation and a large low-field magnetoresistance (MR) accompanied by a first-order metamagnetic transition in the vicinity of Curie temperature (T[SUBC]) were observed in polycrystalline...


Read the Article


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

Try another library?
Sign out of this library

Other Topics