Structural and magnetic properties of the ferroelectric magnetBaMn1−xZnxF4, a site diluted square-lattice two-dimensional Heisenberg antiferromagnet withS=52

2008 ◽  
Vol 78 (5) ◽  
Author(s):  
J. R. Veira ◽  
D. N. Argyriou ◽  
K. Kiefer ◽  
A. U. B. Wolter ◽  
D. Alber ◽  
...  
2017 ◽  
Vol 95 (23) ◽  
Author(s):  
Hironori Yamaguchi ◽  
Yusuke Tamekuni ◽  
Yoshiki Iwasaki ◽  
Rei Otsuka ◽  
Yuko Hosokoshi ◽  
...  

1979 ◽  
Vol 19 (1) ◽  
pp. 306-317 ◽  
Author(s):  
J. N. McElearney ◽  
L. L. Balagot ◽  
J. A. Muir ◽  
R. D. Spence

1990 ◽  
Vol 5 (2) ◽  
pp. 422-434 ◽  
Author(s):  
Masatsugu Suzuki ◽  
Louis J. Santodonato ◽  
Mildred Yeh ◽  
Samuel M. Sampere ◽  
Andrew V. Smith ◽  
...  

The structural and magnetic properties of the stage 2 CocNi1−cCl2- and COcFe1−cCl2-graphite intercalation compounds (GICs) for 0 ≤ c ≤ 1 have been studied by x-ray scattering and dc magnetic susceptibility. The stage 2 CocNi1−cCl2-GICs approximate two-dimensional randomly-mixed ferromagnets with XY spin symmetry. The average effective magnetic moment Peff, the Curie-Weiss temperature θ, and the paramagnetic-to-ferromagnetic phase transition temperature Tc have been determined as continuously varying functions of Co concentration c. They indicate that the Co2+ and Ni2+ spins are randomly distributed on the triangular lattice sites of each intercalate layer. They also show that the intraplanar exchange interaction J(Co–Ni) between the Co2+ and Ni2+ spins is enhanced and is larger than the interaction J(Co–Co) between two Co2+ spins and J(Ni–Ni) between two Ni2+ spins. This enhanced interaction, J(Co–Ni), can be expressed as J(Co–Ni) = 1.28 [J(Co–Co) · J(Ni–Ni)]1/2. The stage 2 CocFc1−cCl2-GICs approximate two-dimensional randomly mixed ferromagnets with competing spin anisotropy. The dc magnetic susceptibility results suggest that Co2+, Fe3+ rather than Fe2+ are distributed in the intercalate layer. The repeat distance along the c-axis (d-spacing) versus Co concentration deviates from Vegard's law which states that the d-spacing is proportional to Co concentration. The broad peak of d-spacing observed at c = 0.75 is discussed in terms of the double layer model developed by Jin and Mahanti.


2010 ◽  
Vol 107 (9) ◽  
pp. 09E108 ◽  
Author(s):  
Yang Li ◽  
Weipeng Wang ◽  
Xiaoxiang Li ◽  
Lihua Liu ◽  
Aihua Wang ◽  
...  

2014 ◽  
Vol 70 (a1) ◽  
pp. C976-C976
Author(s):  
Alexei Belik ◽  
Wei Yi ◽  
Qifeng Liang ◽  
Yoshitaka Matsushita ◽  
Masahiko Tanaka ◽  
...  

Synthesis, crystal chemistry, and physics of perovskites with small cations at the A site are an emerging field in perovskite science. Properties of ABO3 perovskites with small cations at the A site (A = Sc and In; B = transition metals) will be reported. ScBO3 and InBO3 perovskites extend the corresponding families of perovskites with A = Y, La-Lu, and Bi and exhibit larger structural distortions. As a result of large distortions, they show, in many cases, distinct structural and magnetic properties. It is manifested in B-site-ordered monoclinic structures of ScMnO3 [Inorg. Chem. 52 (2013) 9692] and `InMnO3' [Angew. Chem.: Inter. Ed. 49 (2010) 7723]; an unusual superstructure of ScRhO3 and InRhO3 [Inorg. Chem. 52 (2013) 12005]; two magnetic transitions in ScCrO3 and InCrO3 with very close transition temperatures [Chem. Mater. 24 (2012) 2197]; and antiferromagnetic ground states and multiferroic properties of Sc2NiMnO6 and In2NiMnO6 [Inorg. Chem. 52 (2013) 14108]. Features of such perovskites, such as, transition metal doping into the A site, (Sc1-xBx)BO3, will be discussed. Special attention will be given to new spin-driven multiferroics Sc2NiMnO6 and In2NiMnO6.


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