Spin-Transition and Ferromagnetic Interactions in Copper(II) Complexes of a 3-Pyridyl-Substituted Imino Nitroxide. Dependence of the Magnetic Properties upon Crystal Packing

1996 ◽  
Vol 35 (12) ◽  
pp. 3484-3491 ◽  
Author(s):  
Fabrice Lanfranc de Panthou ◽  
Dominique Luneau ◽  
Ryza Musin ◽  
Lars Öhrström ◽  
André Grand ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystal Packing ◽  
Spin Transition ◽  
Ferromagnetic Interactions ◽  
Imino Nitroxide

Structural, magnetic and Mössbauer spectroscopic studies of the [Fe(3-bpp)2](CF3COO)2 complex: role of crystal packing leading to an incomplete Fe(ii) high spin ⇋ low spin transition

CrystEngComm ◽  
2021 ◽  
Vol 23 (15) ◽  
pp. 2854-2861
Author(s):  
Kristian Handoyo Sugiyarto ◽  
Djulia Onggo ◽  
Hiroki Akutsu ◽  
Varimalla Raghavendra Reddy ◽  
Hari Sutrisno ◽  
...  
Keyword(s):  
High Spin ◽  
Crystal Packing ◽  
Spin Transition ◽  
Spectroscopic Studies ◽  
Mononuclear Complex

Mononuclear complex [Fe(3-bpp)2](CF3COO)2 exhibits a thermal (HS + HS) ⇋ (HS + LS) transition at ∼226 K which is not associated with any crystallographic transition.

Observation of short range ferromagnetic interactions and magnetocaloric effect in cobalt substituted Gd5Si2Ge2

2017 ◽  
Vol 19 (19) ◽  
pp. 12282-12295 ◽  
Author(s):  
Bhagya Uthaman ◽  
P. Manju ◽  
Senoy Thomas ◽  
Deepshikha Jaiswal Nagar ◽  
K. G. Suresh ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Strong Correlation ◽  
Short Range ◽  
Ferromagnetic Interactions

Gd5Si2−xCoxGe2 compounds exhibit a strong correlation between their structure and magnetic properties showing Griffith's like phases and magnetocaloric effect.

scholarly journals Crystal Structures and Magnetic Properties of Two New Cobalt(II) Complexes with Triazole-Substituted Nitronyl and Imino Nitroxide Radicals

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jing Chen ◽  
You-Juan Zhang ◽  
Kun-Tao Huang ◽  
Qiang Huang ◽  
Jun-Jie Wang
Keyword(s):  
Magnetic Properties ◽  
Metal Ions ◽  
Crystal Structures ◽  
Magnetic Measurements ◽  
Nitroxide Radicals ◽  
Triclinic Space Group ◽  
Space Group ◽  
Imino Nitroxide

Two new cobalt(II) complexes of formula [Co(hfac)2(NITphtrz) 1 and Co(hfac)2(IMphtrz) 2] have been prepared and characterized structurally [where NITphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl-3-oxide and IMphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl]. All of the complexes crystallize in an isomorphous triclinic space group P1- with the Co(II) ion octahedrally coordinated via the bidentate chelating mode. The magnetic measurements show that two complexes exhibit antiferromagnetic interactions between the metal ions and the nitroxide radicals.

Carrier-Concentration-Dependent Magnetic Properties of the Diluted Magnetic Semiconductor SnMnte

1989 ◽  
Vol 151 ◽  
Author(s):  
H. J. M. Swagten ◽  
S. J. E. A. Eltink ◽  
W. J. M. De Jonge
Keyword(s):  
Magnetic Properties ◽  
Low Temperature ◽  
Experimental Evidence ◽  
Carrier Concentration ◽  
Diluted Magnetic Semiconductor ◽  
Critical Concentration ◽  
Magnetic Semiconductor ◽  
Magnetic Phases ◽  
Diluted Magnetic ◽  
Ferromagnetic Interactions

ABSTRACTIn this paper experimental evidence is presented for the carrier concentration dependence of the magnetic properties of Sn0.97Mn0.03Te, yielding a critical concentration above which ferromagnetic interactions are dominant. The observed behavior can be fairly well explained within a modified RKKY-model. Preliminary experiments on the low temperature magnetic phases indicate re-entrant spinglass behavior, which is qualitatively described with the spinglass model of Sherrington and Kirkpatrick.

scholarly journals First principle calculations of electronic and magnetic properties of Mn-doped CdS (zinc blende): a theoretical study

2017 ◽  
Vol 35 (3) ◽  
pp. 479-485 ◽  
Author(s):  
Nisar Ahmed ◽  
Azeem Nabi ◽  
Jawad Nisar ◽  
Muhammad Tariq ◽  
Muhammad Arshad Javid ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Density Functional ◽  
Magnetic Moments ◽  
Local Magnetic Moment ◽  
Ferromagnetic Phase ◽  
Generalized Gradient ◽  
Zinc Blende ◽  
Type Semiconductor ◽  
Ferromagnetic Interactions ◽  
Mn Doped

AbstractThe electronic structure and magnetic properties of Mn doped zinc blende cadmium sulfide Cd1-xMnxS (x = 6.25 %) have been studied using spin-polarized density functional theory within the framework of Generalized Gradient Approximation (GGA), its further corrections including Hubbard U interactions (GGA + U) and a model for exchange and correlation potential Tran Blaha modified Becke-Johnson (TB-mBJ). Ferromagnetic interactions have been observed between Mn atoms via S atom due to strong p-d hybridization. The magnetic moments on Mn and its neighboring atoms have also been studied in detail using different charge analysis techniques. It has been observed that p-d hybridization reduced the value of local magnetic moment of Mn in comparison to its free space charge value and produced small local magnetic moments on the nonmagnetic S and Cd host sites. The magnetocrystalline anisotropy in [1 0 0] and [1 1 1] directions as well as exchange splitting parameters Noα and Noβ have been analyzed to confirm that ferromagnetism exists. We conclude that the ferromagnetic phase in Mn-doped CdS is not stable in “near” configuration but it is stable for “far” configuration. Mn doped CdS is a p-type semiconductor and the d-states at the top of the valence band edge give a very useful material for photoluminescence and magneto-optical devices.

scholarly journals Crystal structure of bis(azido-κN)bis(quinolin-8-amine-κ2N,N′)iron(II)

2016 ◽  
Vol 72 (10) ◽  
pp. 1488-1491
Author(s):  
Fatima Setifi ◽  
Dohyun Moon ◽  
Robeyns Koen ◽  
Zouaoui Setifi ◽  
Morad Lamsayah ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Structure Determination ◽  
Crystal Packing ◽  
Octahedral Geometry ◽  
Title Complex ◽  
Two Dimensional ◽  
Azide Ion ◽  
Amine Ligands

The search for new molecular materials with interesting magnetic properties using the pseudohalide azide ion and quinolin-8-amine (aqin, C9H8N2) as a chelating ligand, led to the synthesis and structure determination of the title complex, [Fe(N3)2(C9H8N2)2]. The complex shows an octahedral geometry, with the FeIIatom surrounded by six N atoms; the two N3−anions coordinate in acisconfiguration, while the remaining N atoms originate from the two quinolin-8-amine ligands with the quinoline N atoms lying on opposite sides of the Fe atom. The crystal packing is dominated by layers of hydrophilic and aromatic regions parallel to theacplane, stabilized by a two-dimensional hydrogen-bonded network and π–π stacking.

Sign in / Sign up

Export Citation Format

Share Document