Magnetic and structural properties of Fe x Pt100−x on MgO(110) substrates

Lü, Wei; Fan, Junwei; Wang, Yuxin; Yan, Biao

doi:10.1007/s10853-011-5298-x

Cited by 14 publications

(28 citation statements)

References 14 publications

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“…Simply, the hard layer annealed at 500 o C will be presented as L10-FePt in following discussions. found that the in-plane lattice was shorter than the off-plane one supposing that the composition was close to Fe 50 Pt 50 [9]. This supports our conclusion in this paper.…”

Section: Resultssupporting

confidence: 91%

Exchange Springs in <inline-formula> <tex-math notation="LaTeX">${L} 1_{0}$ </tex-math></inline-formula>-FePt(110)/<inline-formula> <tex-math notation="LaTeX">${A}1$ </tex-math></inline-formula>-FePt Bilayer Films

Dan

Zhao

et al. 2015

IEEE Trans. Magn.

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To investigate the effect of hard/soft exchange spring on magnetic properties, L10-FePt/A1-FePt bilayer films had been fabricated on MgO(110) substrates by using magnetron sputtering. The hard layer annealed at a moderate temperature of 500 o C showed an unseparated granular morphology with an almost full coverage, in spite of an incomplete A1→L10 transition. The c axis (easy axis) of L10-FePt preferred to align in plane rather than off plane. For a system of L10-FePt(10 nm)/A1-FePt(20 nm), the magnetization jumped abruptly at +1.4 kOe (= nucleation field of soft layer) and -7 kOe (= switching field of hard layer), respectively. However, a perfectly rectangle-like magnetization curve with a coercivity as high as ~10 kOe was observed for a system of L10-FePt(30 nm)/A1-FePt(20 nm). This indicates that the exchange length might be able to be affected by grain growth in an incompletely A1→L10 transited FePt film. According to experimental results, exchange length of the annealed FePt(30 nm) film should exceed 10 nm, which is much larger than that (5 nm) of ideal L10-FePt. These bilayer films are suitable for fabricating MFM tips to measure different magnetic objects.Index Terms-coervicity, exchange spring, L10-FePt/A1-FePt bilayer film, magnetization reversal.

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Section: Resultssupporting

confidence: 91%

Exchange Springs in <inline-formula> <tex-math notation="LaTeX">${L} 1_{0}$ </tex-math></inline-formula>-FePt(110)/<inline-formula> <tex-math notation="LaTeX">${A}1$ </tex-math></inline-formula>-FePt Bilayer Films

Dan

Zhao

et al. 2015

IEEE Trans. Magn.

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“…The equilibrium can be shifted toward the fructose with the help of base (via Lobry de Bruyn‐Alberda van Ekenstein (LdB‐AvE) mechanism) or Lewis acid. Lactic acid, another feedstock derived from fructose/glucose, is widely used in the polymer industries, production of bio‐degradable plastics, and fine‐chemical industries . Similar to fructose, the conventional bio‐catalytic production of lactic acid is not attractive due to waste generation (salt) and the deployment of non‐regenerable costly bio‐catalyst .…”

Section: Introductionmentioning

confidence: 99%

Bi‐Functional Magnesium Silicate Catalyzed Glucose and Furfural Transformations to Renewable Chemicals

Kumar

Srivastava

2020

ChemCatChem

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Bio-refinery is attracting significant interest to produce a wide range of renewable chemicals and fuels from biomass that are alternative to fossil fuel derived petrochemicals. Similar to petrochemical industries, bio-refinery also depends on solid zeolite catalysts. Acid-base catalysis plays pivotal role in producing a wide range of chemicals from biomass. Herein, the Mg framework substituted MTW zeolite is synthesized and explored in the valorisation of glucose and furfural. Bi-functional (acidic and basic) characteristics are confirmed using pyridine adsorbed FTÀ IR analysis and NH 3 and CO 2 temperatureprogrammed desorption techniques. Textural properties and morphological information are retrieved from N 2-sorption, X-ray photoelectron spectroscopy, and electron microscopy. The activity of the catalyst is demonstrated in the selective isomerisation of glucose to fructose in ethanol. Glucose is converted to methyl lactate in high yield using the same catalyst. Further, the bi-functional activity of this catalyst is demonstrated in the production of fuel precursor by the reaction of furfural and isopropanol. MgÀ MTW zeolite exhibits excellent activity in the production of all these chemicals and fuel derivative. The catalyst exhibits no significant loss in the activity even after five recycles. One simple catalyst affording three renewable synthetic intermediates from glucose and furfural will attract significant attention to catalysis researchers and industrialists.

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“…The high yield of LA in aqueous solution benefited from the Lewis basicity of Zn‐Sn‐Beta, which suppressed side reactions associated with carbohydrate dehydration. Recently, other acidic porous catalysts, such as Mg‐MOF, were also reported for the conversion of glucose into ML in methanol, which gave moderate yields of ML at 220 °C (Table , entry 9) …”

Section: Catalytic Processes With a Decrease In Carbon Numbermentioning

confidence: 99%

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

Saravanamurugan

et al. 2018

ChemSusChem

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Shifting from petroleum‐based resources to inedible biomass for the production of valuable chemicals and fuels is one of the significant aspects in sustainable chemistry for realizing the sustainable development of our society. Various renowned biobased platform molecules, such as 5‐hydroxymethylfurfural, furfural, levulinic acid, and lactic acid, are successfully accessible from the transformation of biobased sugars. To achieve the specific reaction routes, heterogeneous nanoporous acidic materials have served as promising catalysts for the conversion of bio‐sugars in the past decade. This Review summarizes advances in various nanoporous acidic materials for bio‐sugar conversion, in which the number of carbon atoms is variable and controllable with the assistance of the switchable structure of nanoporous materials. The major focus of this Review is on possible reaction pathways/mechanisms and the relationships between catalyst structure and catalytic performance. Moreover, representative examples of catalytic upgrading of biobased platform molecules to biochemicals and fuels through selective C−C cleavage and coupling strategies over nanoporous acidic materials are also discussed.

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Magnetic and structural properties of Fe x Pt100−x on MgO(110) substrates

Cited by 14 publications

References 14 publications

Exchange Springs in <inline-formula> <tex-math notation="LaTeX">${L} 1_{0}$ </tex-math></inline-formula>-FePt(110)/<inline-formula> <tex-math notation="LaTeX">${A}1$ </tex-math></inline-formula>-FePt Bilayer Films

Exchange Springs in <inline-formula> <tex-math notation="LaTeX">${L} 1_{0}$ </tex-math></inline-formula>-FePt(110)/<inline-formula> <tex-math notation="LaTeX">${A}1$ </tex-math></inline-formula>-FePt Bilayer Films

Bi‐Functional Magnesium Silicate Catalyzed Glucose and Furfural Transformations to Renewable Chemicals

Catalytic Upgrading of Biomass‐Derived Sugars with Acidic Nanoporous Materials: Structural Role in Carbon‐Chain Length Variation

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