The ferric chloride-.alpha.-diamine system. 3. X-ray crystallographic, magnetic susceptibility, and zero- and high-field Moessbauer spectroscopy investigation of bis(2,2'-bipyridine)dichloroiron(2+) tetrachloroferrate(2-): slow paramagnetic relaxation and magnetic ordering of complex bimetallic salts

1985 ◽  
Vol 24 (26) ◽  
pp. 4585-4591 ◽  
Author(s):  
Edward H. Witten ◽  
William M. Reiff ◽  
K. Lazar ◽  
Brian W. Sullivan ◽  
Bruce M. Foxman
1997 ◽  
Vol 11 (07) ◽  
pp. 323-331 ◽  
Author(s):  
V. P. S. Awana ◽  
Rajvir Singh ◽  
D. A. Landinez Tellez ◽  
J. M. Ferreira ◽  
J. Albino Aguiar ◽  
...  

We present the results of superconductivity, normal state magnetic susceptibility and heat capacity measurements on the tetragonal CaLa 1-x Pr x BaCu 3 O 7 compound. Ac susceptibility measurements show that the transition temperature T c of the unsubstituted sample decreases with an increase in the Pr concentration. Normal state dc magnetic susceptibility measurements performed in an applied field of 0.5 T show a Curie–Weiss behaviour in terms of the paramagnetic moment of Pr. The effective paramagnetic moment of Pr appears to be intermediate between those of the free Pr 3+ and Pr 4+ ions. For the nonsuperconducting samples i.e., x = 0.70 and 1.0, we observe an antiferromagnetic ordering temperature T N of nearly 4 K and 8 K respectively. The X-ray diffraction results show that the CaPrBaCu 3 O 7 compound is free from other phases, having a minor (less than 8%, in terms of peak intensity) impurity phase. The lower T N (8 K) of PrBaCaCu 3 O 7 as compared to the known antiferromagnetic ordering temperature of 17 K for PrBa 2 Cu 3 O 7 indicates a less deleterious effect of Pr in the present case.


2005 ◽  
Vol 44 (2) ◽  
pp. 206-216 ◽  
Author(s):  
Elena A. Buvaylo ◽  
Vladimir N. Kokozay ◽  
Olga Yu. Vassilyeva ◽  
Brian W. Skelton ◽  
Julia Jezierska ◽  
...  

ChemInform ◽  
2015 ◽  
Vol 46 (28) ◽  
pp. no-no
Author(s):  
Anna L. Smith ◽  
Amir Hen ◽  
Philippe E. Raison ◽  
Eric Colineau ◽  
Jean-Christophe Griveau ◽  
...  

1999 ◽  
Vol 602 ◽  
Author(s):  
H. Sato ◽  
T. Enoki ◽  
K. Wakiya ◽  
M. Isobe ◽  
Y. Ueda ◽  
...  

AbstractA comprehensive study of transport properties and magnetism on β-MnO2 reveals the strong coupling between the conduction electrons and the localized spins which are supposed to form a magnetic helix below TN ∼ 92 K. We also show the direct evidences of the helical magnetism by means of the measurements of the anisotropy in the magnetic susceptibility and the observation of x ray magnetic scatterings on a single crystal of β-MnO2. These results are consistent with proper-type helix model proposed by Yoshimori [J. Phys. Soc. Jpn. 14, p. 807 (1959)]. This model also qualitatively agrees with the anisotropy in magnetoresistance that appears below TN. The pitch of the magnetic helix is not commensurate to the lattice and it is slightly temperature dependent. The intensity of several Bragg peaks drastically changes at TN suggesting that the magnetic ordering is accompanied by a lattice distortion.


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