The rise of 3-d single-ion magnets in molecular magnetism: towards materials from molecules?

Frost, Jamie M.; Harriman, Katie L. M.; Murugesu, Muralee

doi:10.1039/c5sc03224e

Cited by 539 publications

(418 citation statements)

References 98 publications

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“…Magnetic properties in these materials are known to be influenced by the exchange coupling of 3d orbital electrons with the host semiconductor QDs' electronic levels. 45 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 doped CdS nanocrystals 49 , Co 2+ doped ZnSe. 13 These discrepancies have been explained as due to inhomogeneous doping of magnetic ions inside DMS QDs.…”

Section: Particles (D) Magnetization (M) Vs Field (H) Hysteresis Loomentioning

confidence: 99%

Uniform Doping in Quantum-Dots-Based Dilute Magnetic Semiconductor

Saha¹,

Shetty²,

Pavan³

et al. 2016

J. Phys. Chem. Lett.

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Effective manipulation of magnetic spin within a semiconductor leading to a search for ferromagnets with semiconducting properties has evolved into an important field of dilute magnetic semiconductors (DMS). Although a lot of research is focused on understanding the still controversial origin of magnetism, efforts are also underway to develop new materials with higher magnetic temperatures for spintronics applications. However, so far, efforts toward quantum-dots(QDs)-based DMS materials are plagued with problems of phase separation, leading to nonuniform distribution of dopant ions. In this work, we have developed a strategy to synthesize highly crystalline, single-domain DMS system starting from a small magnetic core and allowing it to diffuse uniformly inside a thick CdS semiconductor matrix and achieve DMS QDs. X-ray absorption fine structure (XAFS) spectroscopy and energy-dispersive X-ray spectroscopy-scanning transmission electron microscopy (STEM-EDX) indicates the homogeneous distribution of magnetic impurities inside the semiconductor QDs leading to superior magnetic property. Further, the versatility of this technique was demonstrated by obtaining ultra large particles (∼60 nm) with uniform doping concentration as well as demonstrating the high quality magnetic response.

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Section: Particles (D) Magnetization (M) Vs Field (H) Hysteresis Loomentioning

confidence: 99%

Uniform Doping in Quantum-Dots-Based Dilute Magnetic Semiconductor

Saha¹,

Shetty²,

Pavan³

et al. 2016

J. Phys. Chem. Lett.

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“…Single-ion magnets (SIMs) are simply a subclass of SMMs wherein the electronic spin term originates from a single magnetic centre [7,8]. In SIMs, the ion bearing the spin is most commonly a transition metal [9][10][11][12][13], lanthanoid [14][15][16][17][18][19][20][21][22], or actinoid [23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Molecular single-ion magnets based on lanthanides and actinides: Design considerations and new advances in the context of quantum technologies

McAdams

Ariciu

Kostopoulos

et al. 2017

Coordination Chemistry Reviews

308

226

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Over the past fifteen years or so, the study of f-element single-ion magnets (f-SIMs) has gone from being a sub-discipline of molecular magnetism to an established field of research in its own right. The major driving force has been their exceptional promise in applications such as ultra-high-density data storage, spintronics, and quantum information processing (QIP). Recent demonstrations that f-SIMs preserve their intrinsic magnetic properties even when deposited onto substrates have reinforced the interests in the field.Here, we review the current state of the field of lanthanide and actinide f-SIMs; discuss the principal factors affecting the magnetic and quantum properties of such single-ion magnets; review the latest chemical approaches in designing f-SIMs with superior properties; and highlight new trends in single molecule magnetism, including using f-SIMs as potential spin qubits for quantum computers.

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“…Molecule-based nanomagnets, such as single-molecule magnets (SMMs) [1][2][3][4][5][6][7] and single-ion magnets (SIMs) [8][9][10][11][12], are strictly low-dimensional magnetic systems that exhibit magnetization blocking at low temperatures, quantum tunneling of magnetization (QTM) [13], and quantum coherence [14,15]. Accordingly, SMMs have attracted a great deal of interest as promising candidates blocking at low temperatures, quantum tunneling of magnetization (QTM) [13], and quantum coherence [14,15].…”

Section: Introductionmentioning

confidence: 99%

Field-Induced Slow Magnetic Relaxation of Mono- and Dinuclear Dysprosium(III) Complexes Coordinated by a Chloranilate with Different Resonance Forms

et al. 2017

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Abstract:We synthesized the dinuclear and mononuclear dysprosium(III) complexes [{Dy(Tp) 2 } 2 (Cl 2 An)]·2CH 2 Cl 2 (1) and [Co(Cp) 2 ][Dy(Tp) 2 (Cl 2 An)] (3), where Cl 2 An 2− and Tp − are the chloranilate and hydrotris(pyrazolyl)borate ligand, respectively. In addition, the magnitude of the magnetic coupling between the lanthanide centers through the Cl 2 An 2− bridge has been probed through the synthesis of [{Gd(Tp) 2 } 2 (Cl 2 An)]·2CH 2 Cl 2 (2), which is a gadolinium(III) analogue of 1. Complexes 1-3 were characterized by infrared (IR) spectroscopy, elemental analysis, single-crystal X-ray diffraction, and SQUID measurements. IR and single-crystal X-ray structural analyses confirm that the coordination environments of the lanthanide(III) centers in 1 and 3 are similar to each other; i.e., eight-coordinated metal centers, each occupied by an N 6 O 2 donor set from two Tp − ligands and one Cl 2 An 2− ligand. The coordination geometries of the lanthanide(III) centers in 1 and 2 are distorted triangular dodecahedral, while that in the mononuclear complex 3 is square antiprismatic, where the Cl 2 An 2− ligand takes the bi-separated delocalized form in 1 and 2, and the o-quinone form in 3. Alternating-current (AC) magnetic studies clearly reveal that both 1 and 3 exhibit field-induced slow relaxations of magnetization that occur via Raman and direct processes. Complexes 1 and 3 exhibit different spin relaxation behavior, which reflects the coordination geometry around each Dy III center and its nuclearity, as well as the molecular packing in the crystal lattice. Although the magnetic analysis of 2 revealed negligible magnetic coupling, Cl 2 An 2− bridges with small biases may form in the dinuclear complexes, which play roles in the spin relaxation dynamics through dipolar interactions.

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The rise of 3-d single-ion magnets in molecular magnetism: towards materials from molecules?

Cited by 539 publications

References 98 publications

Uniform Doping in Quantum-Dots-Based Dilute Magnetic Semiconductor

Uniform Doping in Quantum-Dots-Based Dilute Magnetic Semiconductor

Molecular single-ion magnets based on lanthanides and actinides: Design considerations and new advances in the context of quantum technologies

Field-Induced Slow Magnetic Relaxation of Mono- and Dinuclear Dysprosium(III) Complexes Coordinated by a Chloranilate with Different Resonance Forms

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