scholarly journals Magnetic Behaviour of Implanted Transition Metal Probes at Different Lattice Sites in Metals

1998 ◽  
Vol 51 (2) ◽  
pp. 157 ◽  
Author(s):  
D. Riegel ◽  
W. D. Brewer
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Theoretical Work ◽  
Heavy Ion ◽  
Magnetic Behaviour ◽  
Special Importance ◽  
Electron Configuration ◽  
Distribution Method ◽  
Recoil Implantation ◽  
Basic Features

Usually, the occurrence of magnetism on isolated, substitutional 3d, 4d and 5d impurity ions in metals is restricted to certain 3d ions (mainly Cr, Mn, Fe, Co, Ni) in alloying metallic systems. The application of the perturbed γ-ray distribution method following heavy ion reactions and recoil implantation has offered an experimental technique for producing and investigating new magnetic systems. Of special importance are nonalloying systems, which can exhibit extreme variations of e.g. density of states and atomic volume in the probe–host combinations produced by recoil implantation. Recent developments in this field include the following: Magnetism and the Kondo effect observed for 43Sc ions in alkali metal hosts are found to be consistent with a nearly localised, ionic 3d1 single-electron configuration, and parallel the behaviour observed in certain Ce systems. More generally, essential features of the magnetism of 3d and 4d ions in sp metal hosts are similar to those of 4f systems. Recent experimental and theoretical studies of 54Fe in d-band metal hosts are of key importance for an understanding of the basic features of local moment formation on substitutional Fe ions in transition metal hosts in general. In many nonalloying 54Fe probe-host combinations, (at least) two different magnetic responses have been detected. These components correspond to substitutional and interstitial sites of the implanted probes, as has been verified by in-beam Mössbauer spectroscopy of 57Fe in a series of host metals. This provides new insight into lattice site occupation as a function of host properties and allows directed investigations of the magnetic behaviour of Fe (and Mo) ions on interstitial lattice sites. Depending on the host metal, interstitial Fe is found to be nonmagnetic, e.g. in Zr, or magnetic, e.g. in Yb. Surprisingly, even the 4d ion Mo can be magnetic on interstitial sites. The experimental results for the substitutional as well as the interstitial sites can be compared to extensive theoretical work within the framework of local spin density calculations.

Foreword: Nuclear methods in magnetism

1998 ◽  
Vol 51 (2) ◽  
pp. 153
Keyword(s):  
Kondo Effect ◽  
Theoretical Work ◽  
Heavy Ion ◽  
Magnetic Behaviour ◽  
Special Importance ◽  
Electron Configuration ◽  
Distribution Method ◽  
Recoil Implantation ◽  
Recent Developments ◽  
Basic Features

Usually, the occurrence of magnetism on isolated, substitutional 3d, 4d and 5d impurity ions in metals is restricted to certain 3d ions (mainly Cr, Mn, Fe, Co, Ni) in alloying metallic systems. The application of the perturbed γ-ray distribution method following heavy ion reactions and recoil implantation has offered an experimental technique for producing and investigating new magnetic systems. Of special importance are nonalloying systems, which can exhibit extreme variations of e.g. density of states and atomic volume in the probe–host combinations produced by recoil implantation. Recent developments in this field include the following: Magnetism and the Kondo effect observed for 43Sc ions in alkali metal hosts are found to be consistent with a nearly localised, ionic 3d1 single-electron configuration, and parallel the behaviour observed in certain Ce systems. More generally, essential features of the magnetism of 3d and 4d ions in sp metal hosts are similar to those of 4f systems. Recent experimental and theoretical studies of 54Fe in d-band metal hosts are of key importance for an understanding of the basic features of local moment formation on substitutional Fe ions in transition metal hosts in general. In many nonalloying 54Fe probe-host combinations, (at least) two different magnetic responses have been detected. These components correspond to substitutional and interstitial sites of the implanted probes, as has been verified by in-beam Mössbauer spectroscopy of 57Fe in a series of host metals. This provides new insight into lattice site occupation as a function of host properties and allows directed investigations of the magnetic behaviour of Fe (and Mo) ions on interstitial lattice sites. Depending on the host metal, interstitial Fe is found to be nonmagnetic, e.g. in Zr, or magnetic, e.g. in Yb. Surprisingly, even the 4d ion Mo can be magnetic on interstitial sites. The experimental results for the substitutional as well as the interstitial sites can be compared to extensive theoretical work within the framework of local spin density calculations.

KONDO EFFECT AND LOCALIZED SPIN FLUCTUATIONS IN THE Zn-TRANSITION METAL SYSTEM

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-221-C1-223
Author(s):  
P. J. FORD ◽  
C. RIZZUTO ◽  
E. SALAMONI ◽  
P. ZANI
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Spin Fluctuations ◽  
Metal System ◽  
Transition Metal System

Weak Kondo effect in the monocrystalline transition metal dichalcogenide ZrTe2

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Yihao Wang ◽  
Changzheng Xie ◽  
Junbo Li ◽  
Zan Du ◽  
Liang Cao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Transition Metal Dichalcogenide

scholarly journals The First Moment of Azimuthal Anisotropy in Nuclear Collisions from AGS to LHC Energies

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
Subhash Singha ◽  
Prashanth Shanmuganathan ◽  
Declan Keane
Keyword(s):  
Quark Gluon Plasma ◽  
Charged Particles ◽  
Theoretical Work ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Azimuthal Anisotropy ◽  
Flow Focusing ◽  
Nuclear Collisions ◽  
Ion Collisions ◽  
First Moment

We review topics related to the first moment of azimuthal anisotropy (v1), commonly known as directed flow, focusing on both charged particles and identified particles from heavy-ion collisions. Beam energies from the highest available, at the CERN LHC, down to projectile kinetic energies per nucleon of a few GeV per nucleon, as studied in experiments at the Brookhaven AGS, fall within our scope. We focus on experimental measurements and on theoretical work where direct comparisons with experiment have been emphasized. The physics addressed or potentially addressed by this review topic includes the study of Quark Gluon Plasma and, more generally, investigation of the Quantum Chromodynamics phase diagram and the equation of state describing the accessible phases.

On the magnetic behaviour of some UvT compounds (v ev Al, Ga, Sn; T ev Transition metal)

1986 ◽  
Vol 121 ◽  
pp. 169-174 ◽  
Author(s):  
V. SechovskÝ ◽  
L. Havela ◽  
L. Neuv̌il ◽  
A.V. Andreev ◽  
G. Hilscher ◽  
...  
Keyword(s):  
Transition Metal ◽  
Magnetic Behaviour

Electron cloud in accelerators

2014 ◽  
Vol 29 (17) ◽  
pp. 1430023 ◽  
Author(s):  
Roberto Cimino ◽  
Theo Demma
Keyword(s):  
Beam Quality ◽  
Theoretical Work ◽  
Mitigation Strategies ◽  
Cloud Formation ◽  
Predictive Capability ◽  
Physical Origin ◽  
Low Energy Electrons ◽  
Science Laboratories ◽  
Basic Features ◽  
Positively Charged

Low energy electrons in accelerators are known to interact with the circulating beam, giving rise to the formation of a so-called e- cloud. Such e- cloud may induce detrimental effects on the accelerated beam quality and stability. Those effects have been observed in most accelerators of positively charged particles. A longstanding effort has been so far devoted to understand in detail the physical origin of such e- cloud, its build-up and its interaction with the circulating beam. We will first describe the origin and the basic features causing e- cloud formation in accelerators, then we review some of the theoretical work produced to simulate and analyze such phenomenon. In selected cases, theoretical expectations and experimental observations will be compared, to address the importance of benchmarking codes versus observations to reach the required predictive capability. To this scope, codes need realistic input parameters which correctly describe material and surface properties at the basis of such e- cloud formation and build-up. The experimental efforts, performed worldwide in many surface and material science laboratories, to measure such essential parameters will then be presented and critically reviewed. Finally, we will describe some of the e- cloud mitigation strategies adopted so far and draw some conclusions.

scholarly journals Synthesis and structural characterization of transition metal dithiolene derivatives containing divalent metals as counter-cations

CrystEngComm ◽  
2019 ◽  
Vol 21 (9) ◽  
pp. 1423-1432 ◽  
Author(s):  
Oscar Castillo ◽  
Esther Delgado ◽  
Diego Hernández ◽  
Elisa Hernández ◽  
Avelino Martín ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Transition Metal ◽  
Structural Characterization ◽  
Metal Cations ◽  
Magnetic Behaviour ◽  
Divalent Metal ◽  
Divalent Metals ◽  
Divalent Metal Cations ◽  
1D Coordination Polymer

Complexes containing [Fe2(SC6H2Cl2S)4]2− or [Ni(SC6H2Cl2S)2]− entities and divalent metal cations as well as an 1D-coordination polymer K/Zn have been obtained and their magnetic behaviour studied.

Kondo effect in monolayer transition metal dichalcogenide Ising superconductors

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
Yu Zhang ◽  
Lin Li ◽  
Jin-Hua Sun ◽  
Dong-Hui Xu ◽  
Rong Lü ◽  
...  
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Transition Metal Dichalcogenide

scholarly journals Investigation on magne-crystallic action VI. Further studies on paramagnetic crystals

1939 ◽  
Vol 238 (788) ◽  
pp. 125-148 ◽  
Keyword(s):  
Single Crystals ◽  
Electric Fields ◽  
Low Temperatures ◽  
Theoretical Work ◽  
Magnetic Behaviour ◽  
Magnetic Studies ◽  
Angular Momenta ◽  
Recent Theoretical Work ◽  
Paramagnetic Ions ◽  
Van Vleck

In some of the earlier papers in this series (Part II, 1933; Part IV, 1936; Part V, 1938) we gave an account of magnetic studies on single crystals of several paramagnetic salts of the rare earth and the iron groups, and a discussion of the results on the basis of the recent theoretical work of Van Vleck (1932 a, b ), and Penney and Schlapp (1932), on the influence of the strong local electric fields acting on the paramagnetic ions in the crystals on their magnetic behaviour. Paramagnetic studies on single crystals are of interest because of the variety of information one can obtain from them under favourable conditions—on such widely different topics as the magnitude and the asymmetry of the electric field acting on the paramagnetic ion in the crystal; the geometry of distribution of the negatively charged atoms immediately surrounding the paramagnetic ion, and hence the co-ordination number of the ion; the strength of coupling between the orbital and the spin angular momenta of the electrons in the incomplete shell of the ion; and in those crystals in which the paramagnetic ions are all in the S-state, the magnitude of the Stark separation of the S-levels, which plays an important part in determining the thermal properties of the crystal at very low temperatures ( = 0T °K ); etc. Several examples were given, in the papers referred to, to illustrate these various aspects of the magnetic studies on paramagnetic crystals.

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