Microstructure and magnetic characteristics of low-temperature-fired modified Z-type hexaferrite with Bi/sub 2/O/sub 3/ additive

2002 ◽  
Vol 38 (4) ◽  
pp. 1797-1802 ◽  
Author(s):  
Hongguo Zhang ◽  
Ji Zhou ◽  
Yongli Wang ◽  
Longtu Li ◽  
Zhenxing Yue ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Characteristics

scholarly journals Atomistic investigation of surface characteristics and electronic features at high-purity FeSi(110) presenting interfacial metallicity

2021 ◽  
Vol 118 (17) ◽  
pp. e2021203118
Author(s):  
Biao Yang ◽  
Martin Uphoff ◽  
Yi-Qi Zhang ◽  
Joachim Reichert ◽  
Ari Paavo Seitsonen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Density Of States ◽  
Density Functional ◽  
Iron Silicide ◽  
Density Functional Theory Calculations ◽  
Surface Characteristics ◽  
Scanning Tunneling ◽  
Magnetic Characteristics ◽  
Tunneling Microscopy ◽  
Single Crystal Surfaces

Iron silicide (FeSi) is a fascinating material that has attracted extensive research efforts for decades, notably revealing unusual temperature-dependent electronic and magnetic characteristics, as well as a close resemblance to the Kondo insulators whereby a coherent picture of intrinsic properties and underlying physics remains to be fully developed. For a better understanding of this narrow-gap semiconductor, we prepared and examined FeSi(110) single-crystal surfaces of high quality. Combined insights from low-temperature scanning tunneling microscopy and density functional theory calculations (DFT) indicate an unreconstructed surface termination presenting rows of Fe–Si pairs. Using high-resolution tunneling spectroscopy (STS), we identify a distinct asymmetric electronic gap in the sub-10 K regime on defect-free terraces. Moreover, the STS data reveal a residual density of states in the gap regime whereby two in-gap states are recognized. The principal origin of these features is rationalized with the help of the DFT-calculated band structure. The computational modeling of a (110)-oriented slab notably evidences the existence of interfacial intragap bands accounting for a markedly increased density of states around the Fermi level. These findings support and provide further insight into the emergence of surface metallicity in the low-temperature regime.

Magnetic Characteristics of Single-Block and Multi-Block Nd-Fe-B Permanent Magnets at Low Temperature

2016 ◽  
Vol 7 ◽  
pp. 1-5 ◽  
Author(s):  
Botian Zheng ◽  
Jun Zheng ◽  
Shuaishuai Si ◽  
Yu Ren ◽  
Xun Xu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Permanent Magnets ◽  
Magnetic Characteristics ◽  
Single Block

Low‐Temperature Magnetic Characteristics of Tetrahedral CoCl4 2−. I. g‐Tensor Orientation in Doped [(C2H5)4N]2ZnCl4

1972 ◽  
Vol 56 (8) ◽  
pp. 3750-3754 ◽  
Author(s):  
G. E. Shankle ◽  
J. N. McElearney ◽  
R. W. Schwartz ◽  
A. R. Kampf ◽  
R. L. Carlin
Keyword(s):  
Low Temperature ◽  
Magnetic Characteristics

Determination of magnetic characteristics of nanoparticles by low-temperature calorimetry methods

2017 ◽  
Vol 513 ◽  
pp. 77-81 ◽  
Author(s):  
A. Ugulava ◽  
Z. Toklikishvili ◽  
S. Chkhaidze ◽  
Sh. Kekutia
Keyword(s):  
Low Temperature ◽  
Magnetic Characteristics ◽  
Low Temperature Calorimetry

scholarly journals Enhanced Magnetization of Sol-Gel Synthesized Pb-Doped Strontium Hexaferrites Nanocrystallites at Low Temperature

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Shahid M. Ramay ◽  
Shahid Atiq ◽  
Murtaza Saleem ◽  
Asif Mahmood ◽  
Saadat A. Siddiqi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Saturation Magnetization ◽  
Structural Parameters ◽  
Hexagonal Phase ◽  
Magnetic Moments ◽  
Sol Gel ◽  
Magnetic Characteristics ◽  
Energy Product ◽  
Pb Substitution

Effect of Pb doping on the structural and low temperature magnetic properties ofSrPbxFe12-xO19(x=0,0.1,0.2,0.3,and  0.4), synthesized by sol-gel autocombustion technique, has been investigated. The powder samples were sintered at 800°C for 2 h in order to develop the stable hexagonal phase, characteristic of the SrFe12O19structure. The consequences of Pb substitution (at iron sites) on various structural parameters like lattice constants, unit cell volume, crystallite size, and porosity have been discussed. Fourier transform infrared frequency bands were utilized to determine the formation of tetrahedral and octahedral clusters of M-type ferrites. Hexagonal texture of the grains, a characteristic of the hexagonal crystal structure of SrFe12O19, was refined by Pb substitution. The magnetic properties, determined using a vibrating sample magnetometer, revealed that saturation magnetization decreased, while coercivity was increased with the increase of Pb contents. However, the increased squareness ratio and hence the energy product motivate the utilization of these ferrite compositions where hard magnetic characteristics are required. The increased values of saturation magnetization were observed at reduced temperature of 200 K, attributable to the better spin alignments of individual magnetic moments at low temperature.

Low‐Temperature Magnetic Characteristics of Tetrahedral CoCl4 2−. II. Nature of the Phase Transition in [(C2H5)4N]2CoCl4

1972 ◽  
Vol 56 (8) ◽  
pp. 3755-3758 ◽  
Author(s):  
J. N. McElearney ◽  
G. E. Shankle ◽  
R. W. Schwartz ◽  
R. L. Carlin
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Magnetic Characteristics
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