Crystal Structure and Magnetic Properties of Polybis(formamide)bis(μ-formato)cobalt(II):  An Extended Two-Dimensional Square Lattice Material Which Exhibits Spontaneous Magnetization below 9 K

1999 ◽  
Vol 38 (6) ◽  
pp. 1360-1363 ◽  
Author(s):  
Steven J. Rettig ◽  
Robert C. Thompson ◽  
James Trotter ◽  
Shihua Xia
2013 ◽  
Vol 52 (12) ◽  
pp. 7087-7093 ◽  
Author(s):  
Miguel Cortijo ◽  
Santiago Herrero ◽  
Reyes Jiménez-Aparicio ◽  
Emilio Matesanz

2016 ◽  
Vol 72 (10) ◽  
pp. 1488-1491
Author(s):  
Fatima Setifi ◽  
Dohyun Moon ◽  
Robeyns Koen ◽  
Zouaoui Setifi ◽  
Morad Lamsayah ◽  
...  

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.


2010 ◽  
Vol 81 (17) ◽  
Author(s):  
Alexander A. Tsirlin ◽  
Ramesh Nath ◽  
Artem M. Abakumov ◽  
Roman V. Shpanchenko ◽  
Christoph Geibel ◽  
...  

1996 ◽  
Vol 74 (1-2) ◽  
pp. 54-64 ◽  
Author(s):  
D. D. Betts ◽  
S. Masui ◽  
N. Vats ◽  
G. E. Stewart

The well-known finite-lattice method for the calculation of the properties of quantum spin systems on a two-dimensional lattice at zero temperature was introduced in 1978. The method has now been greatly improved for the square lattice by including finite lattices based on parallelogram tiles as well as the familiar finite lattices based on square tiles. Dozens of these new finite lattices have been tested and graded using the [Formula: see text] ferromagnet. In the process new and improved estimates have been obtained for the XY model's ground-state energy per spin, ε0 = −0.549 36(30) and spontaneous magnetization per spin, m = 0.4349(10). Other properties such as near-neighbour, zero-temperature spin–spin correlations, which appear not to have been calculated previously, have been estimated to high precision. Applications of the improved finite-lattice method to other models can readily be carried out.


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