Atomic Magnetic Moment and Exchange Interaction between Mn Atoms in Intermetallic Compounds in Mn-Ge System

1990 ◽  
Vol 59 (1) ◽  
pp. 273-288 ◽  
Author(s):  
Nobuyoshi Yamada
Keyword(s):  
Exchange Interaction ◽  
Intermetallic Compounds ◽  
Magnetic Moment ◽  
Atomic Magnetic Moment

Structure and Magnetic Properties of GdPt2In and GdPt2Sn

2009 ◽  
Vol 64 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Birgit Heying ◽  
Ute Ch. Rodewald ◽  
Wilfried Hermes ◽  
Rainer Pöttgen
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Crystal ◽  
Intermetallic Compounds ◽  
Coordination Number ◽  
Magnetic Moment ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Experimental Magnetic Moment

The platinum-rich intermetallic compounds GdPt2In and GdPt2Sn were synthesized by arc-melting of the elements and subsequent annealing. The structures were refined from single crystal X-ray diffractometer data: ZrPt2Al type, space group P63/mmc, a = 455.1(1), c = 899.3(3) pm, wR2 = 0.0361, 166 F2 values, 9 variables for GdPt2In, and a = 453.2(1), c = 906.5(2) pm, wR2 = 0.0915, 166 F2 values, 9 variables for GdPt2Sn. The platinum and indium (tin) atoms build up threedimensional [Pt2In] and [Pt2Sn] networks with short Pt-In (Pt-Sn) distances and Pt2 dumb-bells (290 and 297 pm in GdPt2In and GdPt2Sn). The gadolinium atoms have coordination number 14 with 8 Pt and 6 In (Sn) neighbors. Magnetic susceptibility measurements on GdPt2In show Curie-Weiss behavior with an experimental magnetic moment of 8.06(2) μB/Gd atom. GdPt2In orders ferromagnetically at 27.7(2) K

scholarly journals Chemical Mesoscopics Notions in the Explanation of Polymeric Materials Modification Mechanism with Participation of Metal Carbon Mesocomposites

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
V. I. Kodolov ◽  
V. V. Kodolova-Chukhontseva ◽  
I. N. Shabanova ◽  
N. S. Terebova ◽  
Yu. V. Pershin ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Polymeric Materials ◽  
Magnetic Characteristics ◽  
Nanosized Particles ◽  
Atomic Magnetic Moment ◽  
Materials Properties ◽  
The Creation ◽  
Unpaired Electrons

The paper is dedicated to the consideration of the chemical mesoscopics notions application for the explanation of polymeric materials modification mechanism by the metal carbon mesoscopic composites. The main peculiarities of these nanosized particles are following: a) the presence of unpaired electrons on the carbon cover; b) the structure of carbon cover consists from poly acetylene and carbine fragments; c) the atomic magnetic moment of inner metal is equaled to more than 1,3 μB. The creation of reactive mesoscopic materials with regulated magnetic characteristics which can find the application as modifiers of materials properties is very topical. The present investigation has fundamental character. It’s based on the ideas concerning to the metal carbon mesocomposites reactivity depending on the medium and conditions influence because of the possible changes of the phase coherency and quantization of negative charges.

FORMATION OF MAGNETIC MOMENTS IN INTERMETALLIC COMPOUNDS AND ALLOYS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 756-759 ◽  
Author(s):  
T. BEUERLE ◽  
K. HUMMLER ◽  
M. FÄHNLE
Keyword(s):  
Transition Metals ◽  
Ab Initio ◽  
Intermetallic Compounds ◽  
Magnetic Moment ◽  
Nearest Neighbor ◽  
Physical Mechanism ◽  
Magnetic Moments ◽  
Lmto Method ◽  
Minimum Number ◽  
Alloy Systems

Jaccarino and Walker proposed that in certain alloy systems a considered kind of atom attains a constant value of the magnetic moment if it is surrounded by at least a minimum number of nearest-neighbor atoms of a certain kind, and that it is nonmagnetic otherwise. It is shown by ab initio supercell calculations within the LMTO method that the system Nbi−xMox with 1% iron approximately fulfills the Jaccarino-Walker hypothesis, whereas the alloy FexRh1−x does not. The physical mechanism for the destruction of the Fe moment in bcc alloys with 4d and 5d transition metals is elucidated.

ATOMIC MAGNETIC MOMENT AND ELECTRONIC STRUCTURE OF Fe-B AMORPHOUS ALLOYS BASED ON X-RAY PHOTOELECTRON SPECTROSCOPY

1993 ◽  
Vol 07 (01n03) ◽  
pp. 926-929 ◽  
Author(s):  
I.G. BATIREV ◽  
J.A. LEIRO ◽  
M. HEINONEN
Keyword(s):  
Electronic Structure ◽  
Magnetic Moment ◽  
Photoelectron Spectroscopy ◽  
Amorphous Alloys ◽  
Ferromagnetic State ◽  
Specific Charge ◽  
Exchange Splitting ◽  
Potential Approximation ◽  
Atomic Magnetic Moment ◽  
X Ray

The electronic structure of amorphous and crystalline Fe100–xBx alloys for 14≤x≤19.5 has been studied by x-ray photoelectron spectroscopy and calculated in terms of the modified coherent potential approximation. Exchange splitting measurements of 3s-spectra were used to estimate the atomic magnetic moment of the Fe atom in Fe-B amorphous and crystalline alloys. These results agree qualitatively with saturation magnetization measurements including the deviation from the Slater-Pauling curve. This deviation according to our calculations is the result of the specific charge transfer of s, p and d electrons at about 15.5 at % B. The calculation in ternary alloy approach shows a stable ferromagnetic state of Fe atoms for the studied alloy concentrations.

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