Enhancing magnetic performance of pyrazine-N-oxide bridged dysprosium chains through controlled variation of ligand coordination modes

2021 ◽  
Author(s):  
Hao-Ling Sun ◽  
Xiao-Qin Ji ◽  
Jin Xiong ◽  
Rong Sun ◽  
Fang Ma ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Modes ◽  
Molecular Nanomagnets ◽  
Magnetic Performance ◽  
Formidable Challenge ◽  
Ligand Coordination

While assembling superparamagnetic units in a controlled manner is crucial for future applications of molecular nanomagnets, it still constitutes a formidable challenge to optimize their magnetic properties while achieving a...

Temperature-induced structural transformations accompanied by changes in magnetic properties of two copper coordination polymers

CrystEngComm ◽  
2020 ◽  
Vol 22 (20) ◽  
pp. 3482-3488 ◽  
Author(s):  
Jing Tu ◽  
Hongjuan Chen ◽  
Hongju Tian ◽  
Xianyong Yu ◽  
Baishu Zheng ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Structural Transformations ◽  
Organic Ligands ◽  
Coordination Modes ◽  
Copper Compounds ◽  
Copper Coordination

Two ferromagnetic copper compounds have been synthesized under different temperature, which represented the rare example of structural transformations resulting from the coordination modes of organic ligands supported by magnetic results.

A Series of 2D and 3D Novel Lanthanide Complexes Constructed from Squarate C4O42–: Syntheses, Structures, Magnetic Properties, and Near-infrared Emission Properties

2011 ◽  
Vol 64 (10) ◽  
pp. 1373 ◽  
Author(s):  
Li Wang ◽  
Wen Gu ◽  
Xiu-Jun Deng ◽  
Ling-Fei Zeng ◽  
Sheng-Yun Liao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Near Infrared ◽  
Variable Temperature ◽  
Infrared Emission ◽  
Luminescence Spectra ◽  
Coordination Modes ◽  
Metal Precursors ◽  
Trivalent Lanthanide ◽  
Lanthanide Metal ◽  
2D And 3D

The solvothermal combination of trivalent lanthanide metal precursors with a squarate ligand (H2C4O4, 3,4-dihydroxy-3-cyclobutene-1,2-dione) has afforded the preparation of a family of eight new coordination polymers, [Ln2(C4O4)3(H2O)4] (Ln = La–Nd, Ho) (1–5), [Ln2(C4O4)3(H2O)8] (Ln = Er, Dy) (6, 7), and Tb2(C4O4)2(C2O4)(H2O)4 (8). Structural analysis reveals that the squarate ligand displays versatile coordination modes to generate novel 2D and 3D frameworks. Three new coordination modes, a bidentate/monodentate μ3 and two bidentate/monodentate μ4 coordination modes, are first reported. In addition, the variable-temperature magnetic properties of the Pr, Nd, Ho, Dy, and Tb complexes, the solid-state near-infrared luminescence spectra of the Pr, Nd, Ho, and Er complexes, and their thermogravimetric analyses are discussed.

The Effects of Cross Hatch Angle (CHA) on Magnetic Properties and Read/Write Characteristics of CoCrPtTaB Thin Film Media

1994 ◽  
Vol 343 ◽  
Author(s):  
Ga-Lane Chen ◽  
H. Do ◽  
T.-A. Yeh ◽  
J. M. Sivertsen ◽  
J. H. Judy
Keyword(s):  
Thin Film ◽  
Magnetic Properties ◽  
Intensity Ratio ◽  
Media Industry ◽  
Signal Noise ◽  
Media Noise ◽  
Magnetic Performance ◽  
Squareness Ratio ◽  
The Relationship ◽  
Tribology Performance

ABSTRACTCross-hatch type texturing has been widely used to replace circumferential texturing in the thin film media industry for optimizing tribology performance. However, higher “cross hatch angle” (CHA) may degrade magnetic performance. The relationship between texturing cross hatch angle (CHA) and magnetic properties and their effects on the read/write characteristics of sputtered thin film media are discussed in this paper. As the CHA increases, both the orientation ratio (OR) and the squareness ratio “S(c)/S(r)” decrease. The film with the highest OR is located at CHA=90, which has the lowest media noise. The medium has highest signal/noise ratio when CHA is equal to 90. PW50 can decrease as much as 4 nanoseconds as CHA increases to 730. By calculating a ratio of the intensity of Cr (110) + CoCrPtTaB (0002) to the intensity of Cr (200), we are able to correlate the intensity ratio to magnetic properties and read/write characteristics.

scholarly journals Influence of nitrogen donor ligands on the coordination modes of copper(ii) 2-nitrobenzoate complexes: structures, DFT calculations and magnetic properties

2014 ◽  
Vol 38 (1) ◽  
pp. 437-447 ◽  
Author(s):  
Raj Pal Sharma ◽  
Anju Saini ◽  
Divyakshi Monga ◽  
Paloth Venugopalan ◽  
Julia Jezierska ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Dft Calculations ◽  
Donor Ligands ◽  
Nitrogen Donor Ligands ◽  
Coordination Modes ◽  
Nitrogen Donor

scholarly journals Effect of Pretreatment on Magnetic Nanoparticle Growth on Graphene Surface and Magnetic Performance in Electroless Plating

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Kyunbae Lee ◽  
Taehoon Kim ◽  
Sang Bok Lee ◽  
Byung Mun Jung
Keyword(s):  
Magnetic Material ◽  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Electroless Plating ◽  
Magnetic Nanoparticle ◽  
High Concentration ◽  
Graphene Surface ◽  
Future Studies ◽  
Nanoparticle Growth ◽  
Magnetic Performance

Electroless plating involves sensitization, activation, and plating processes. Sensitization and activation are conducted by dipping the substrate in SnCl2 solution and PdCl2 solution, respectively. These pretreatment processes are required to plate the substrate with noncatalytic surfaces. We investigated the effect of sensitization on the magnetic properties of FeCoNi@graphene hybrids prepared via electroless plating. The solution concentrations during sensitization were varied to observe changes in the structural, morphological, and magnetic properties of FeCoNi@graphene using XRD, TEM, and VSM, respectively. Sensitization under high concentration produced a large amount of SnO2, resulting in low saturation magnetization. Further, the FeCoNi@graphene hybrid prepared via electroless plating without sensitization also exhibited low saturation magnetization owing to the formation of oxides and hydroxides. We prepared FeCoNi@graphene with a saturation magnetization of 40.8 emu/g under sensitization at low concentration; this is the highest saturation magnetization among the reported magnetic material@graphene hybrids prepared via electroless plating. This study provides guidelines for the pretreatment of graphene via electroless plating and should contribute to future studies on the synthesis of magnetic material@graphene hybrids.

Screw dislocation-driven t-Ba2V2O7 helical meso/nanosquares: microwave irradiation assisted-SDBS fabrication and their unique magnetic properties

2017 ◽  
Vol 5 (25) ◽  
pp. 6336-6342 ◽  
Author(s):  
Yan Sun ◽  
Jianli Wang ◽  
Mingzhe Chen ◽  
Chunsheng Li ◽  
Zhenpeng Hu ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Reaction Time ◽  
Microwave Irradiation ◽  
Screw Dislocation ◽  
Microwave Radiation ◽  
High Efficiency ◽  
Magnetic Performance ◽  
Controlled Preparation

The morphology-controlled preparation of t-Ba2V2O7 helical-like meso/nanosquares via a high-efficiency microwave radiation-assisted surfactant strategy and their unique magnetic performance as a function of particle size and reaction time were reported.

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