Magnetic "dead" layer at a complex oxide interface.

نویسندگان

  • Weidong Luo
  • Stephen J Pennycook
  • Sokrates T Pantelides
چکیده

Recent magnetic measurements at La0.67Ca0.33MnO3/YBa2Cu3O7 interfaces led to conflicting interpretations: a magnetic "dead" layer on the LCMO side or antiparallel Cu and Mn magnetic moments. Here we report results of first-principles density-functional calculations of position-dependent magnetic couplings between interlayer and intralayer Mn atoms. The couplings in the first few layers near the interface are found to be weak ferromagnetic or even antiferromagnetic. The results suggest that a "dead" magnetic layer 2-3 atoms thick is present, as needed to account for the observations.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Quantitative Predictions of Dead Layers Induced by Surface Roughness in Isotropic Type II Superconductors

In type II superconductors where the coherence length ξ is small compared to the London penetration depth λ, the London equation is valid and it predicts that magnetic fields decay exponentially in magnitude with the depth into the superconductor with a length scale λ, provided the interface is flat. Various direct measurements of λ using low energy μSR on superconductors such as Yttrium-Barium...

متن کامل

Spinel-Type Cobalt Oxide (Co3O4) Nanoparticles from the mer- Co(NH3)3(NO2)3 Complex: Preparation, Characterization, and Study of Optical and Magnetic Properties

In this paper, the mer-Co(NH3)3(NO2)3 complex was used as a new precursor for synthesizing spinel-type cobalt oxide nanoparticles (Co3O4NPs).Thermal decomposition of the complex at low temperature (175 °C) resulted in the Co3O4NPs without using expensive and toxic solvents or complicated equipment. XRD, FT-IR, SEM, EDX, and TEM were employed to characterize the product, and its optical and magn...

متن کامل

OPTIMAL DESIGN OF SINGLE-LAYER BARREL VAULT FRAMES USING IMPROVED MAGNETIC CHARGED SYSTEM SEARCH

The objective of this paper is to present an optimal design for single-layer barrel vault frames via improved magnetic charged system search (IMCSS) and open application programming interface (OAPI). The IMCSS algorithm is utilized as the optimization algorithm and the OAPI is used as an interface tool between analysis software and the programming language. In the proposed algorithm, magnetic c...

متن کامل

باز توزیع ناخالصی آرسنیک (As) در رشد گرمایی و سرعت رشد اکسید سیلیسیم

 In this article, we investigate the redistribution of implanted As+ ion and effect of it on the rate of oxide growth during steam oxidation of Si wafers at 900oC. Our results show that a highly enriched, thin layer of Arsenic forms at the interface between the oxide and the underlying Si. Also, the oxidation rate was found to increase depending on the depth distribution and dose of the implant...

متن کامل

Investigation of Effect of Accumulation Layer Thickness of ENZ material on Electro-Absorption Modulator

In this paper, the performance of an optical modulator based on indium tin oxide is investigated at telecommunication wavelength for different accumulation thickness. The plan of metal-oxide-semiconductor is utilized to change the carrier concentration at indium tin oxide-hafnium oxide interface. An optical mode solver based finite element method has been used to calculate the basic parameters ...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Physical review letters

دوره 101 24  شماره 

صفحات  -

تاریخ انتشار 2008