نتایج جستجو برای: fept nanocrystals

تعداد نتایج: 11056  

2002
Chao Liu Timothy J. Klemmer Nisha Shukla Xiaowei Wu Dieter Weller Mihaela Tanase David Laughlin

Chemically disordered B3–7-nm-diameter FePt nanoparticles are synthesized using the airless operation technique based on decomposition of iron pentacarbonyl and reduction of platinum acetylacetonate. The particle solution is then washed and subsequently deposited onto a thermally oxidized Si substrate. Nanoparticle assemblies are formed after solvent evaporation. The samples are heat-treated us...

Journal: :Physical review letters 2011
Hongbin Zhang Frank Freimuth Stefan Blügel Yuriy Mokrousov Ivo Souza

We carry out ab initio calculations which demonstrate the importance of the non-spin-conserving part of the spin-orbit interaction for the intrinsic anomalous Hall conductivity of ordered FePt alloys. The impact of this interaction is strongly reduced if Pt is replaced by the lighter isoelectronic element Pd. An analysis of the interband transitions responsible for the anomalous velocity reveal...

2003
Hyun Seok Ko A. Perumal Sung-Chul Shin

We present the results on highly anisotropic oriented face-centered-tetragonal ordered equiatomic FePt thin films embedded in a C matrix prepared by cosputtering technique on MgO ~100! substrates at 400 °C. We have found that doping of C in FePt alloy films is an effective and appropriate way to control the L10 ordering and growth of grain size down to 4 nm. Room-temperature magnetic measuremen...

Journal: :جنگل و فرآورده های چوب 0
مهدی روحانی استادیار علوم و صنایع چوب و کاغذ، گروه سلولزی و بسته بندی، پژوهشکدۀ شیمی و پتروشیمی، پژوهشگاه استاندارد، کرج، ایران بهزاد کرد استادیار علوم و صنایع چوب و کاغذ، گروه سلولزی و بسته بندی، پژوهشکدۀ شیمی و پتروشیمی، پژوهشگاه استاندارد، کرج، ایران نازنین مطیع دانشجوی دکتری علوم و صنایع چوب و کاغذ، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران فرحناز بهزادی کارشناس ارشد علوم و صنایع چوب و کاغذ، گروه سلولزی و بسته بندی، پژوهشکدۀ شیمی و پتروشیمی، پژوهشگاه استاندارد، کرج، ایران

the aim of this study was to investigate the barrier properties of cellulose nanocrystals-pvananocomposites. nanocomposite films with different filler loading levels (3, 6, 9 and 12% by wt) weredeveloped by solvent casting method. the effect of cellulose nanocrystals on the barrier properties ofthe nanocomposites was studied. to this end, moisture absorption, water vapor permeability (wvp),oxyg...

ZnO and ZnO: Mn nanocrystals were synthesized via reverse micelle method. The structural properties of nanocrystals were investigated by XRD. The XRD results indicated that the synthesized nanocrystals had a pure wurtzite (hexagonal phase) structure. Resistive gas sensors were fabricated by providing ohmic contacts on the tablet obtained from compressed nanocrystals powder and the installation ...

2014
J. Bentley J. E. Wittig J. R. McBride

There remains much interest in the development of FePt for magnetic recording media. For almost a decade we have performed extensive studies of FePt multilayers and nanoparticles, especially epitactic growth on layers of MgO and the phase transformation from a disordered solid solution to the L10 ordered structure that exhibits attractive magnetic properties [1-7]. Many studies incorporated ato...

Journal: :ACS applied materials & interfaces 2014
Vijay Kumar Sharma Burak Guzelturk Talha Erdem Yusuf Kelestemur Hilmi Volkan Demir

We report white-light-emitting Mn-doped ZnSe nanocrystals (NCs) that are synthesized using modified nucleation doping strategy. Tailoring three distinct emission mechanisms in these NCs, which are MnSe-related blue emission (410 and 435 nm), Zn-related defect state green emission (520 nm), and Mn-dopant related orange emission (580 nm), allowed us to achieve excitation wavelength tailorable whi...

Journal: :Physical review letters 2010
K M Seemann Y Mokrousov A Aziz J Miguel F Kronast W Kuch M G Blamire A T Hindmarch B J Hickey I Souza C H Marrows

We determine the composition of intrinsic as well as extrinsic contributions to the anomalous Hall effect (AHE) in the isoelectronic L1_{0} FePd and FePt alloys. We show that the AHE signal in our 30 nm thick epitaxially deposited films of FePd is mainly due to an extrinsic side jump, while in the epitaxial FePt films of the same thickness and degree of order the intrinsic contribution is domin...

Journal: :Physical review letters 2012
K M Seemann F Garcia-Sanchez F Kronast J Miguel A Kákay C M Schneider R Hertel F Freimuth Y Mokrousov S Blügel

We analyze the origin of the electrical resistance arising in domain walls of perpendicularly magnetized materials by considering a superposition of anisotropic magnetoresistance and the resistance implied by the magnetization chirality. The domain wall profiles of L1(0)-FePd and L1(0)-FePt are determined by micromagnetic simulations based on which we perform first-principles calculations to qu...

2012
Cai Liang Chinthaka Gooneratne Dongkyu Cha Long Chen Yogesh Gianchandani Jurgen Kosel

Related Articles Spacer-less, decoupled granular L10 FePt magnetic media using Ar–He sputtering gas J. Appl. Phys. 112, 113916 (2012) Room-temperature ferromagnetism induced and controlled by electric field in BaNbO3 films Appl. Phys. Lett. 101, 232407 (2012) Phase diagrams of strained Ca1–xCexMnO3 films J. Appl. Phys. 112, 113703 (2012) Spin waves and small intrinsic damping in an in-plane mag...

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