Regular versus alternating (FeS4)(n) chains: Magnetism in KFeS2 and CsFeS2
Data(s) |
01/10/1997
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Resumo |
We report crystal magnetic susceptibility results of two S = 1/2 one-dimensional Heisenberg antiferromagnets, KFeS2 and CsFeS2. Both compounds consist of (FeS4)(n) chains with an average Fe-Fe distance of 2.7 Angstrom. In KFeS2, all intrachain Fe-Fe distances are identical. Its magnetic susceptibility is typical of a regular antiferromagnetic chain with spin-spin exchange parameter J = -440.7 K. In CsFeS2, however, the Fe-Fe distances alternate between 2.61 and 2.82 Angstrom. This is reflected in its magnetic susceptibility, which could be fitted with J = -640 K, and the degree of alternation, alpha = 0.3. These compounds form a unique pair, and allow for a convenient experimental comparison of the magnetic properties of regular versus alternating Heisenberg chains. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/38383/1/Regular_versus_alternating_%EF%BF%BDFeS4.pdf Tiwary, Satish K and Vasudevan, Sukumaran (1997) Regular versus alternating (FeS4)(n) chains: Magnetism in KFeS2 and CsFeS2. In: Physical Review B: Condensed Matter, 56 (13). pp. 7812-7814. |
Publicador |
The American Physical Society |
Relação |
http://prb.aps.org/abstract/PRB/v56/i13/p7812_1 http://eprints.iisc.ernet.in/38383/ |
Palavras-Chave | #Inorganic & Physical Chemistry |
Tipo |
Journal Article PeerReviewed |