Crystal structure and magnetic properties of ternary Al3CoNd2 compound

2021 ◽  
pp. 1-6
Author(s):  
Liuqing Liang ◽  
Degui Li ◽  
Chenzhong Jia ◽  
Ming Qin
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Lattice Parameter ◽  
Calculated Density ◽  
Cobalt Ions ◽  
Saturation Magnetic Moment ◽  
Refinement Method

A ternary compound Al3CoNd2 was synthesized and its crystal structure parameters were determined by the Rietveld refinement method based on powder X-ray diffraction data. Results show that the compound crystallizes in the MgCu2-type structure (cubic Laves C15 phase, space group $Fd\bar{3}m$ ), with the lattice parameter of a = 7.8424(2) Ǻ, unit-cell volume of V = 482.33 Å3, and calculated density of Dcalc = 5.90 g.cm−3. The residual factors converge to Rp = 0.1024 and Rwp = 0.1287. The reference intensity ratio value obtained experimentally is 3.03. Magnetic susceptibility measurements indicate an agreement with the Curie–Weiss law in the temperature range of 385–450 K, and paramagnetic Curie temperature of θp = 379.9 K. Both rare-earth elements and cobalt ions contribute to the paramagnetic moment. The saturation magnetic moment and magnetic hysteresis loop were measured for the Al3CoNd2 compound at various temperatures. Results show that the saturation magnetic moment value decreases with an increase in temperature and the compound becomes a ferromagnet below the Curie temperature Tc.

The Nanoflower-Like Morphology and Magnetism of As-Milled Ho(Ni0.8Co0.2)3 Powders Prepared by HEBM

2016 ◽  
Vol 257 ◽  
pp. 76-80 ◽  
Author(s):  
Anna Bajorek ◽  
Clément Berger ◽  
Krystian Prusik ◽  
Marcin Wojtyniak ◽  
Grażyna Chełkowska
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Intermetallic Compounds ◽  
Magnetic Moment ◽  
Saturation Magnetic Moment

The morphology and magnetic properties of the Ho(Ni0.8Co0.2)­3 crystalline and ball – milled intermetallic compounds are presented. The polycrystalline bulk compound crystallizes in the rhombohedral PuNi3 - type of crystal structure and indicates ferrimagnetic arrangement with the Curie temperature of TC = 48 ± 1 K, the helimagnetic temperature Th = 26 ± 2 K with the total saturation magnetic moment of 7.78 µB/f.u. at 2 K. The use of the HEBM method leads to the formation of nanoflakes with typical thickness of less than 100 nm. The extended milling leads to the reduction in particles/crystallites size and in the emergence of the relatively small coercivity (HC).

scholarly journals Влияние атомов замещения и внедрения на магнитные свойства соединения Sm-=SUB=-2-=/SUB=-Fe-=SUB=-17-=/SUB=-

2021 ◽  
Vol 47 (12) ◽  
pp. 6
Author(s):  
С.В. Веселова ◽  
И.С. Терёшина ◽  
В.Н. Вербецкий ◽  
К.В. Захаров ◽  
В.Б. Тверской ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Saturation Magnetization ◽  
Room Temperature ◽  
Magnetic Hysteresis ◽  
Inert Gas ◽  
Magnetic Characteristics ◽  
Induction Melting ◽  
Gas Atmosphere ◽  
Hysteresis Properties

(Sm1-xRx)2Fe17 (R = Ho, Er) alloys with х = 0.1, 0.2 and 0.4 were prepared by induction melting under inert gas atmosphere. The structure and magnetic hysteresis properties of both the initial compositions and hydrides based on them are investigated. It was found that (Sm1-xRx)2Fe17Нy hydrides like the parent compounds have a rhombohedral Th2Zn17-type of crystal structure (sp.gr. R m). Hydrogenation results in a significant increase in the Curie temperature and saturation magnetization at room temperature. Compositions with potentially high magnetic characteristics have been determined.

The Magnetocaloric Properties of (Mn1-XFeX)5Sn3 Compounds Prepared in Magnetic Environment

2011 ◽  
Vol 299-300 ◽  
pp. 520-524 ◽  
Author(s):  
Jian Huang ◽  
Jie Xiang ◽  
Ce Zhi ◽  
Xue Zhen Wang ◽  
Xue Ling Hou
Keyword(s):  
Crystal Structure ◽  
Powder Metallurgy ◽  
Curie Temperature ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Lattice Parameter ◽  
Powder Metallurgy Method ◽  
Magnetic Entropy ◽  
Magnetocaloric Properties ◽  
Cell Volumes

The crystal structure, microstructure, Curie temperature and magnetocaloric properties of (Mn1-xFex)5Sn3 (x=0.1~0.5) alloys were studied in this paper. The alloys were prepared by powder metallurgy method with magnetic pressing and magnetic sintering. All samples crystallize in the hexagonal InNi2-type structure with space group P63/mmc. The lattice parameter, cell volumes of the (Mn1-xFex)5Sn3 decrease with increasing x, while the Curie temperature of these alloys increases almost linearly with increasing x. All samples exhibit a moderate magnetocaloric effect, and the curves of magnetic entropy change are flat in a wide temperature range, which is suitable for the Ericsson cycle.

Structure and Magnetocaloric Effect of B-Doped Mn-Fe-P-Si Compounds

2021 ◽  
Vol 323 ◽  
pp. 152-158
Author(s):  
Shou Yuan Xing ◽  
Song Lin ◽  
Zhi Qiang Song ◽  
Zhi Qiang Ou
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Lattice Parameter ◽  
Magnetic Entropy ◽  
Field Change ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Patterns ◽  
P Type ◽  
Type Crystal

We reported the structural, magnetic and magenetocaloric properties of Mn1.25Fe0.75P0. 50Si0.50Bx(x = 0.01, 0.02 and 0.04) X-ray diffraction patterns show that all compounds crystallize in the hexagonal Fe2P-type crystal structure. Lattice parameter a increases while c decreases with increasing B contents. The Curie temperature of the compounds have been determined, the values are 219, 268 and 323.2 K for x = 0.01, 0.02, 0.04, respectively. The maximum magnetic entropy changes in a field change of 0~1.5 T are 6.1, 5.3 and 3.5J/kg·K for x = 0.01, 0.02 and 0.04, respectively.

Thin Film Growth and Magnetic Properties for Fe/GaAs(100).

1990 ◽  
Vol 202 ◽  
Author(s):  
Bruce A. Andrien ◽  
David R. Miller
Keyword(s):  
Film Thickness ◽  
Hysteresis Loop ◽  
Film Growth ◽  
Magnetic Hysteresis ◽  
High Vacuum ◽  
Three Dimensional ◽  
Magnetic Hysteresis Loop ◽  
Ultra High Vacuum ◽  
Iron Film ◽  
Saturation Magnetic Moment

ABSTRACTThin Fe films, 1 nm to 90 nm, have been grown on GaAs (100) substrates in ultra high vacuum, base pressure = 2×l0−8 Pa. The growth of the films has been followed with Auger electron spectroscopy and a recently developed in-situ UHV M/H hysteresis loop tracer. The Auger signal provides an indication as to when the Fe covers the GaAs substrate or when it clusters into three dimensional islands. The magnetic hysteresis loop tracer provides the coercivity and the saturation magnetic moment, from which the saturation magnetization or average film thickness can be obtained. The coercivity of thin films is sensitive to structure, strain, and to the grain size, in analogy to its sensitivity to particle size for small particles. The data show that the coercivity, Hc, as a function of film thickness, is very sensitive to the annealing procedures and to the resulting morphology, continuous versus local clustering of the iron film. Under proper conditions a clear maximum in Hc versus film thickness is observed for these films near 5 nm thickness, in analogy to three dimensional small particle curves.

Correlation between Anomalous Peak Effect in Magnetic Hysteresis Loop and Nanoscale Structure forNdBa2Cu3O7-δSingle-Crystal Superconductor

1996 ◽  
Vol 35 (Part 1, No. 7) ◽  
pp. 3882-3886 ◽  
Author(s):  
Masaru Nakamura ◽  
Tsukasa Hirayama ◽  
Yasuji Yamada ◽  
Yuichi Ikuhara ◽  
Yuh Shiohara
Keyword(s):  
Hysteresis Loop ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Peak Effect ◽  
Anomalous Peak ◽  
Nanoscale Structure

The Solid Solutions Gd2Cu2In1–xMgx – Drastic Increase of the Curie Temperature upon In/Mg Substitution

2010 ◽  
Vol 65 (12) ◽  
pp. 1516-1520 ◽  
Author(s):  
Wilfried Hermes ◽  
Falko M. Schappacher ◽  
Rainer Pöttgen
Keyword(s):  
Curie Temperature ◽  
Intermetallic Compounds ◽  
Solid Solutions ◽  
Temperature Increase ◽  
Magnesium Content ◽  
Lattice Parameter ◽  
Weiss Constant ◽  
Drastic Increase ◽  
Complete Set ◽  
Mg Substitution

The Mo2B2Fe-type intermetallic compounds Gd2Cu2In and Gd2Cu2Mg form a complete set of solid solutions Gd2Cu2In1−xMgx. The a lattice parameter, the Weiss constant and the Curie temperature increase with increasing magnesium content in an almost Vegard-like manner, while the c parameter remains almost constant. All members of the solid solutions show ferromagnetism with TCs between 114 and 80 K.

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