Magnetic Relaxation of Single-Molecule Magnets in an External Magnetic Field: An Ising Dimer of a Terbium(III)-Phthalocyaninate Triple-Decker Complex

2010 ◽  
Vol 17 (1) ◽  
pp. 117-122 ◽  
Author(s):  
Keiichi Katoh ◽  
Takashi Kajiwara ◽  
Motohiro Nakano ◽  
Yasuhiro Nakazawa ◽  
Wolfgang Wernsdorfer ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnets

Magnetic field and dilution effects on the slow relaxation of {Er3} triangle-based arsenotungstate single-molecule magnets

2020 ◽  
Vol 49 (35) ◽  
pp. 12458-12465 ◽  
Author(s):  
Hanhan Chen ◽  
Lin Sun ◽  
Jinpeng Zhang ◽  
Zikang Xiao ◽  
Pengtao Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Thermally Activated ◽  
Slow Magnetic Relaxation ◽  
Dilution Effects

Triangular {Er3} cluster containing POM exhibits field-induced two thermally activated relaxation processes. Whereas, the diamagnetic dilution sample indicates slow magnetic relaxation with the QTM being partially suppressed.

Efficient enhancement of magnetic anisotropy by optimizing the ligand-field in a typically tetranuclear dysprosium cluster

2015 ◽  
Vol 44 (17) ◽  
pp. 8150-8155 ◽  
Author(s):  
Jiang Liu ◽  
Yan-Cong Chen ◽  
Zhong-Xia Jiang ◽  
Jun-Liang Liu ◽  
Jian-Hua Jia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Thermal Energy ◽  
Ligand Field ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Applied External Magnetic Field

Two tetranuclear dysprosium single molecule magnets under a zero applied external magnetic field showing high thermal energy barriers which are among the highest within the reported tetranuclear lanthanide-based SMMs.

QUALITATIVE COMPARISON OF THE THERMODYNAMICS OF Mn12-ac AND Fe8 MOLECULE MAGNETS FOR Dβ ~ 0.031

2011 ◽  
Vol 25 (15) ◽  
pp. 1281-1291
Author(s):  
M. T. THOMAZ ◽  
ONOFRE ROJAS ◽  
E. V. CORRÊA-SILVA
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Specific Heat ◽  
Excited States ◽  
Single Molecule ◽  
Easy Axis ◽  
Unexpected Result ◽  
Single Molecule Magnets ◽  
Qualitative Comparison ◽  
Percentage Difference

The magnetization and the specific heat of two single molecule magnets (SMM) with spin-10, Mn 12- ac and Fe 8, are compared for Dβ ~ 0.031. The rhombic term in the Fe 8 molecule makes the x-component of its magnetization to be larger than that of the Mn 12- ac molecule. The axial symmetry of the Mn 12- ac favors the z-component of its magnetization, in comparison to the Fe 8 molecule. For T ≳ 18 K, the specific heat of the Mn 12- ac is large (80%, at most) than that of the Fe 8, at the same temperature. The corrections from the S = 9 excited states of these SMM's do not invalidate our results. An unexpected result occurs when the angle between the easy-axis and the external magnetic field equals π/4: the aforementioned percentage difference of the specific heat reaches 3% for D β ≲ 0.025 and h/k ∈[1.93, 2.04], when they are compared at distinct temperatures [Formula: see text]. This small percentage difference also happens for the average specific heat of both SMM's at those temperatures and h/D Mn ∈ [1.97, 2.1].

Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

2015 ◽  
Vol 44 (29) ◽  
pp. 13242-13249 ◽  
Author(s):  
Malay Dolai ◽  
Mahammad Ali ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Magnetic Relaxation ◽  
Magnetic Behaviour ◽  
Dinuclear Complexes ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Slow Magnetic Relaxation

Two CuII–DyIII and CoIII–DyIII dinuclear complexes of a Schiff base ligand (H3L) exhibit single-molecule magnetic behaviour with multiple slow magnetic relaxation processes for the former.

Structural anisotropy of cyanido-bridged {CoII9WV6} single-molecule magnets induced by bidentate ligands: towards the rational enhancement of an energy barrier

2016 ◽  
Vol 52 (26) ◽  
pp. 4772-4775 ◽  
Author(s):  
Szymon Chorazy ◽  
Michał Rams ◽  
Anna Hoczek ◽  
Bernard Czarnecki ◽  
Barbara Sieklucka ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Bidentate Ligands ◽  
Single Molecule Magnets ◽  
Structural Anisotropy ◽  
Slow Magnetic Relaxation

{CoII9[WV(CN)8]6} clusters capped by odd and even number of bidentate ligands reveal the improved slow magnetic relaxation due to the significant structural anisotropy.

Strictly linear trinuclear Dy–Ca/Mg–Dy single-molecule magnets: the impact of long-range f–f ferromagnetic interactions on suppressing quantum tunnelling of magnetization leading to slow magnetic relaxation

2017 ◽  
Vol 46 (25) ◽  
pp. 8259-8268 ◽  
Author(s):  
Wan-Ying Zhang ◽  
Yong-Mei Tian ◽  
Hong-Feng Li ◽  
Peng Chen ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Long Range ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Single Molecule Magnets ◽  
Quantum Tunnelling ◽  
Trinuclear Complexes ◽  
Slow Magnetic Relaxation ◽  
Ferromagnetic Interactions ◽  
The Impact

A series of linear trinuclear complexes Ln2M(OQ)8 [Ln(iii) = Dy and Er, M(ii) = Ca and Mg] were structurally and magnetically investigated.

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Donor Ligands ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Coordination Numbers ◽  
Oxygen Donor ◽  
Slow Magnetic Relaxation

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].

Spin Ice‐like Magnetic Relaxation of a Two‐dimensional Network based on Manganese(III) Salen‐type Single‐Molecule Magnets

2020 ◽  
Vol 59 (49) ◽  
pp. 22048-22053
Author(s):  
Chihiro Kachi‐Terajima ◽  
Tasuku Eiba ◽  
Rikako Ishii ◽  
Hitoshi Miyasaka ◽  
Yuta Kodama ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Relaxation ◽  
Two Dimensional ◽  
Spin Ice ◽  
Single Molecule Magnets ◽  
Dimensional Network
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