Electric Field Induced Room Temperature Null to High Spin State Switching: A Computational Prediction

2019 ◽  
Vol 2 (4) ◽  
pp. 1900005 ◽  
Author(s):  
Carlos O. Amorim ◽  
João S. Amaral ◽  
João N. Gonçalves ◽  
Vítor S. Amaral
Keyword(s):  
Electric Field ◽  
High Spin ◽  
Spin State ◽  
Room Temperature ◽  
High Spin State ◽  
Computational Prediction ◽  
State Switching

scholarly journals Room-Temperature Switching of Spin-State in Single-Molecule Junctions

2020 ◽  
Author(s):  
Jing Li ◽  
QingQing Wu ◽  
Wei Xu ◽  
Hai-Chuan Wang ◽  
Hewei Zhang ◽  
...  
Keyword(s):  
Spin State ◽  
Single Molecule ◽  
Room Temperature ◽  
High Spin State ◽  
Scanning Tunneling ◽  
Molecular Spintronics ◽  
State Switching ◽  
Square Planar ◽  
Single Molecule Junctions ◽  
Conductance Changes

Abstract The emerging of molecular spintronics offers a unique chance for the design of molecular devices with different spin-state, and the control of spin-state becomes essential for molecular spin switches. However, the intrinsic spin switching from low-spin to high-spin state is a temperature-dependent process with a small energy barrier that low temperature is required to maintain the low-spin state, and thus the room-temperature operation of single-molecule devices have not yet been achieved. Here, we investigated the single-molecule charge transport through a diamagnetic square planar nickel(II) porphyrin using the scanning tunneling microscope break-junction (STM-BJ) technique. The reversible single-molecule conductance switches are demonstrated by utilizing a coordination-induced spin-state switching to manipulate the spin state between S = 0 and S = 1 at room temperature. Furthermore, the different coordinated complexes could be distinguished from the conductance traces, which cannot be realized by the ensemble investigations such as NMR and UV-vis spectrums. The combined DFT calculations revealed that the conductance changes come from the different spin-states of the molecules varying the number of coordination ligands, suggesting coordination-induced spin-state switching provides a new way towards room-temperature molecular spintronics.

scholarly journals Co-Substitution Effect in Room-Temperature Ferromagnetic Oxide Sr3.1Y0.9Co4O10.5

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2301
Author(s):  
Akihiro Tsuruta ◽  
Shuji Kawasaki ◽  
Masashi Mikami ◽  
Yoshiaki Kinemuchi ◽  
Yoshitake Masuda ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
High Spin ◽  
Spin State ◽  
Room Temperature ◽  
High Spin State ◽  
Substitution Effect ◽  
Co Substitution ◽  
Intermediate Spin ◽  
Intermediate Spin State

We investigated the Co substitution effect for the magnetic properties in room-temperature ferromagnetic oxide Sr3.1Y0.9Co4O10.5. The substituted element (Al and Ga) and low-spin state Co3+, which was changed from a high-spin or intermediate-spin state by Al or Ga substitution, reduced the Curie temperature to even 1.5 times lower than the temperature estimated from a simple dilution effect. Al3+ preferentially substituted for intermediate-spin-state Co3+ in the ferrimagnetic CoO6 layer and deteriorated the saturation magnetization of Sr3.1Y0.9Co4O10.5. By contrast, Ga3+ substituted for high-spin-state Co3+ in the CoO6 layer and/or the antiferromagnetic CoO4.25 layer and enhanced the saturation magnetization per Co ion. These results indicate that the magnetic properties of Sr3.1Y0.9Co4O10.5 can be controlled by selectively substituting for Co3+ with different spin states.

Steric Trapping of the High Spin State in FeIII Quinolylsalicylaldimine Complexes

2014 ◽  
Vol 67 (11) ◽  
pp. 1574 ◽  
Author(s):  
Darunee Sertphon ◽  
David J. Harding ◽  
Phimphaka Harding ◽  
Keith S. Murray ◽  
Boujemaa Moubaraki ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electronic Properties ◽  
High Spin ◽  
Spin State ◽  
Schiff Base Ligand ◽  
Room Temperature ◽  
Spin Crossover ◽  
High Spin State ◽  
Electrochemical Studies ◽  
Magnetic Studies

A new sterically bulky Schiff base ligand, N-(8-quinolyl)-5-tert-butylsalicylaldimine (Hqsal-5-tBu) has been prepared and a series of FeIII complexes, [Fe(qsal-5-tBu)2]Y (Y = Cl 1, ClO4 2, NO3 3, BF4 4) utilising this ligand are reported and fully characterised. UV-vis spectroscopic and electrochemical studies indicate that 1–4 are high spin (HS) in solution at room temperature and further suggest that the tBu group only slightly alters the electronic properties of 1–4 compared with related [Fe(qsal-5-X)2]+ systems. The structures of [Fe(qsal-5-tBu)2]Cl·4MeOH·H2O 1, [Fe(qsal-5-tBu)2]ClO4·MeOH 2, and [Fe(qsal-5-tBu)2]NO3 3 determined at 100 K reveal HS FeIII centres in all cases. Four-fold parallel aryl embraces and π–π interactions serve to link the cations forming 2D sheets mirroring the motifs found in other [Fe(qsal-5-X)2]+ complexes. Despite this the tBu group causes strong distortions at the Fe centre which as magnetic studies reveal prevent spin crossover trapping 1–4 in the HS state.

Theoretical study on the reduction reactions from solid char(N): The effect of the nearby group and the high-spin state

Energy ◽  
2019 ◽  
Vol 189 ◽  
pp. 116286 ◽  
Author(s):  
Hai Zhang ◽  
Lei Luo ◽  
Jiaxun Liu ◽  
Anyao Jiao ◽  
Jianguo Liu ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
Theoretical Study ◽  
High Spin State ◽  
Reduction Reactions

scholarly journals Supercooled high spin state in metallo-supramolecular assemblies

2007 ◽  
Vol 63 (a1) ◽  
pp. s202-s202
Author(s):  
U. Pietsch ◽  
M. Lommel ◽  
Y. Bodethin ◽  
D. Kurth ◽  
G. Schwarzl ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
High Spin State ◽  
Supramolecular Assemblies

High-Spin State Fe(III) Doped TiO2 for Electrocatalytic Nitrogen Fixation Induced by Surface F Modification

2021 ◽  
pp. 120809
Author(s):  
Guangxin Song ◽  
Rui Gao ◽  
Zhao Zhao ◽  
Yujun Zhang ◽  
Huaqiao Tan ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
High Spin ◽  
Spin State ◽  
High Spin State ◽  
Doped Tio2

Vibrational Coherences and Relaxation in the High-Spin State of Aqueous [FeII(bpy)3]2+

2009 ◽  
Vol 121 (39) ◽  
pp. 7320-7323 ◽  
Author(s):  
Cristina Consani ◽  
Mirabelle Prémont-Schwarz ◽  
Amal ElNahhas ◽  
Christian Bressler ◽  
Frank van Mourik ◽  
...  
Keyword(s):  
High Spin ◽  
Spin State ◽  
High Spin State
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