Hyperfine Fields, Spin Orbit Coupling, and Nuclear Magnetic Moments of Rare-Earth Ions

1962 ◽  
pp. 1086-1088
Author(s):  
R. E. Watson ◽  
A. J. Freeman
Keyword(s):  
Rare Earth ◽  
Magnetic Moments ◽  
Rare Earth Ions ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Hyperfine Fields ◽  
Nuclear Magnetic Moments ◽  
Nuclear Magnetic

scholarly journals Electric field manipulation enhanced by strong spin-orbit coupling: promoting rare-earth ions as qubits

2020 ◽  
Vol 7 (10) ◽  
pp. 1557-1563 ◽  
Author(s):  
Zheng Liu ◽  
Ye-Xin Wang ◽  
Yu-Hui Fang ◽  
Si-Xue Qin ◽  
Zhe-Ming Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Electric Field ◽  
High Efficiency ◽  
High Energy ◽  
Rare Earth Ions ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Field Manipulation ◽  
Strong Spin

Abstract Quantum information processing based on magnetic ions has potential for applications as the ions can be modified in their electronic properties and assembled by a variety of chemical methods. For these systems to achieve individual spin addressability and high energy efficiency, we exploited the electric field as a tool to manipulate the quantum behaviours of the rare-earth ion which has strong spin-orbit coupling. A Ce:YAG single crystal was employed with considerations to the dynamics and the symmetry requirements. The Stark effect of the Ce3+ ion was observed and measured. When demonstrated as a quantum phase gate, the electric field manipulation exhibited high efficiency which allowed up to 57 π/2 operations before decoherence with optimized field direction. It was also utilized to carry out quantum bang-bang control, as a method of dynamic decoupling, and the refined Deutsch-Jozsa algorithm. Our experiments highlighted rare-earth ions as potentially applicable qubits because they offer enhanced spin-electric coupling which enables high-efficiency quantum manipulation.

Investigation of organic magnetoresistance dependence on spin-orbit coupling using 8-hydroxyquinolinate rare-earth based complexes

2016 ◽  
Vol 108 (20) ◽  
pp. 203303 ◽  
Author(s):  
R. S. Carvalho ◽  
D. G. Costa ◽  
H. C. Ávila ◽  
T. B. Paolini ◽  
H. F. Brito ◽  
...  
Keyword(s):  
Rare Earth ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Organic Magnetoresistance

scholarly journals Twisted magnetization phases in orbital-dominant rare-earth nitrides

2021 ◽  
Author(s):  
◽  
James McNulty
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Orbit Coupling ◽  
Ferromagnetic Semiconductors ◽  
Spin Moment ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Orbital Moment ◽  
Orbital Contribution ◽  
Rare Earth Nitrides

<p>In this thesis we investigate the magnetic properties of NdN and SmN, members of the rare-earth nitrides, a series of intrinsic ferromagnetic semiconductors. In rare-earth systems, the strong spin-orbit coupling of the partially filled 4ƒ shell ensures that there is a substantial orbital contribution to the ferromagnetic moment, in contrast to many transition metal systems where the orbital moment is usually quenched. In SmN and NdN the orbital moment actually exceeds the spin moment, and the resulting orbital dominant magnetization allows for the fabrication of a magnetic heterostructures showing novel behavior.  We report a new theoretical study of the magnetic properties on both SmN and NdN by considering the atomic-like 4ƒ electrons. These calculations incorporate spin-orbit coupling, the exchange interaction in a self-consistent mean-field approach, and crystal field interactions in an arbitrary-multiplet point-charge model. Our findings show excellent agreement with the experimentally measured ferromagnetic moments of SmN and NdN, representing an advance from previous theoretical studies.  We also report an experimental study on SmN/GdN heterostructures using the element-resolved method of x-ray magnetic circular dichroism (XMCD) to probe the magnetism. The competition between the orbital-dominant Zeeman coupling in SmN and the ferromagnetic spin-based interface exchange with GdN, which has purely a spin moment, results in a twisted magnetization profile. The depth profile of the magnetization derived from XMCD measurements showed good agreement with an analytical model developed to describe the competing interactions.  In a second study, a superlattice of NdN/GdN was investigated via XMCD and standard magnetometry techniques. A twisted magnetization was shown to be present due to the same mechanism as in the SmN/GdN system. By varying the maximum applied field and temperature, twisted phases were shown to develop in both GdN and NdN layers. These twisted phases in orbital-dominant ferromagnetic semiconductors represent a departure from previously explored spin-dominant metallic systems displaying similar twisted phases.</p>

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