TITLE

Highly enhanced Curie temperature in low-temperature annealed [Ga,Mn]As epilayers

AUTHOR(S)
Ku, K. C.; Potashnik, S. J.; Wang, R. F.; Chun, S. H.; Schiffer, P.; Samarth, N.; Seong, M. J.; Mascarenhas, A.; Johnston-Halperin, E.; Myers, R. C.; Gossard, A. C.; Awschalom, D. D.
PUB. DATE
April 2003
SOURCE
Applied Physics Letters;4/7/2003, Vol. 82 Issue 14, p2302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report Curie temperatures up to 150 K in annealed Ga[sub 1-x]Mn[sub x]As epilayers grown with a relatively low As:Ga beam equivalent pressure ratio. A variety of measurements (magnetization, Hall effect, magnetic circular dichroism and Raman scattering) suggest that the higher Curie temperature results from an enhanced free hole density. The data also indicate that, in addition to the carrier concentration, the sample thickness limits the maximum attainable Curie temperature in this material, suggesting that the free surface of Ga[sub 1-x]Mn[sub x]As epilayers may be important in determining their physical properties.
ACCESSION #
9428267

 

Related Articles

  • The pressure effect of the Curie temperature in TbAl2. Sato, K.; Nishimura, K.; Isikawa, Y.; Kamigaki, K.; Yoshida, H.; Kaneko, T. // Journal of Applied Physics;5/1/1990, Vol. 67 Issue 9, p5298 

    Presents a study which measured the pressure effect of the ferromagnetic Curie temperature in TbAl[sub2] using the induction method under hydrostatic pressure. Behavior of the pressure dependence of the Curie temperature as a function of the cobalt concentration in the compounds; Discussion of...

  • Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC4H4O6 � 4H2O. Moina, A. P.; Levitskii, R. R.; Zachek, I. R. // Condensed Matter Physics;Dec2011, Vol. 14 Issue 4, p43602-1 

    We elaborate a modification of the deformable two-sub lattice Mitsui model of [Levitskii R.R. et al., Phys. Rev. B. 2003, 67, 174112] and [Levitskii R.R. et al., Condens. Matter Phys., 2005, 8, 881] that consistently takes into account diagonal components of the strain tensor, arising either due...

  • Volume dependence of the magnetic coupling in LaFe13-xSix based compounds. Jia, L.; Sun, J. R.; Wang, F. W.; Zhao, T. Y.; Zhang, H. W.; Shen, B. G.; Li, D. X.; Nimori, S.; Ren, Y.; Zeng, Q. S. // Applied Physics Letters;3/10/2008, Vol. 92 Issue 10, p101904 

    The effects of pressure and hydrogenation, the former causes a lattice contraction while the latter causes an expansion of the sample, have been systematically studied for LaFe13-xSix (x=1.3–2.1). It is found that the typical change of the Curie temperature is ∼150 K when ∼1.6...

  • Effect of high pressure on the magnetocaloric property of LaFe11.5Si1.5. Jia, L.; Sun, J. R.; Shen, B. G.; Li, D. X.; Nimori, S. // Journal of Applied Physics;5/15/2007, Vol. 101 Issue 10, p106108 

    A field-induced magnetic entropy change under high pressure has been experimentally studied for the LaFe11.5Si1.5 compound. High pressure causes a linear decrease of the Curie temperature from ~194 to ~88 K, corresponding to a variation of the pressure from ~0 to 1 GPa. Appropriate pressures...

  • Effect of temperature variations and thermal noise on the static and dynamic behavior of straintronics devices. Barangi, Mahmood; Mazumder, Pinaki // Journal of Applied Physics;11/7/2015, Vol. 118 Issue 17, p173902-1 

    A theoretical model quantifying the effect of temperature variations on the magnetic properties and static and dynamic behavior of the straintronics magnetic tunneling junction is presented. Four common magnetostrictive materials (Nickel, Cobalt, Terfenol-D, and Galfenol) are analyzed to...

  • High-pressure Bi(MgZn)TiO perovskite solid solutions. Pushkarev, A.; Olekhnovich, N.; Radyush, Yu. // Inorganic Materials;Oct2011, Vol. 47 Issue 10, p1116 

    We report the preparation of Bi(MgZn)TiO ceramics at a pressure of 6 GPa and temperatures from 1370 to 1570 K. In the composition ranges 0 < x < 0.5 and 0.8 < x < 1, the ceramics consist of perovskite solid solutions. The solid solutions with x < 0.5 have an orthorhombic structure (sp. gr....

  • Effect of high pressure and torsional strain on the structure, microstresses, 55Mn NMR, and magnetoresistance of La0.6Sr0.3Mn1.1O3 ± δ nanopowders. Pashchenko, A. V.; Pashchenko, V. P.; Revenko, Yu. F.; Spuskanyuk, V. Z.; Kasatka, N. G.; Turchenko, V. A.; Shemyakov, A. A. // Technical Physics Letters;Jun2010, Vol. 36 Issue 6, p566 

    The effects of high pressure (3 GPa) and torsional strain on the structure and properties of compacts prepared from nonstoichometric lanthanum-strontium manganite La0.6Sr0.2Mn1.2O3 ± δ (LSMO) nanopowder with a perovskite structure have been studied for the first time using X-ray...

  • Structural and Magnetic Properties of YBaRuCuO and SrReCaCuO Perovskites. Balamurugan, S. // Journal of Superconductivity & Novel Magnetism;Apr2012, Vol. 25 Issue 2, p495 

    In this present investigation, both YBaRuCuO and SrReCaCuO perovskite compounds were prepared through high pressure/high temperature (HPHT) synthetic route. The as-prepared samples were structurally characterized by powder X-ray diffraction technique and their magnetic properties were measured....

  • Effect of hydrostatic pressure in degenerate Ge1-xMnxTe. Lim, S. T.; Bi, J. F.; Teo, K. L.; P, Feng Y.; Liew, T.; Chong, T. C. // Applied Physics Letters;8/17/2009, Vol. 95 Issue 7, p072510 

    We utilize the effect of hydrostatic pressure to investigate the magnetotransport properties of degenerate p-Ge1-xMnxTe (x=0.10) ferromagnetic semiconductor. The Curie temperature was found to increase with pressure as 0.27 K/kbar, which can be understood on the basis of the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics