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Ground state order and spin-lattice coupling in tetrahedral spin systems Cu2Te2O5X2 (CROSBI ID 105300)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Prester, Mladen ; Smontara, Ana ; Živković, Ivica ; Bilušić, Ante ; Drobac, Đuro ; Berger, H. ; Bussy, F. Ground state order and spin-lattice coupling in tetrahedral spin systems Cu2Te2O5X2 // Physical review. B, Condensed matter and materials physics, 69 (2004), 18; 180401(R)-x

Podaci o odgovornosti

Prester, Mladen ; Smontara, Ana ; Živković, Ivica ; Bilušić, Ante ; Drobac, Đuro ; Berger, H. ; Bussy, F.

engleski

Ground state order and spin-lattice coupling in tetrahedral spin systems Cu2Te2O5X2

High-resolution ac susceptibility and thermal conductivity measurement on Cu2Te2O5X2(X=Br, Cl) single crystals are reported. For Br-sample, sample dependence prevents to distinguish between possibilities of magnetically ordered and spin-singlet ground states. In Cl-sample a three-dimensional transition at 18.5 K is accompanied by almost isotropic behavior of susceptibility and almost switching behavior of thermal conductivity. Thermal conductivity studies suggest the presence of a tremendous spin-lattice coupling characterizing Cl- but not Br-sample. Below the transition Cl-sample is in a complex magnetic state involving AF order but also the elements consistent with the presence of a gap in the excitation spectrum.

quantized spin models; static susceptibility; macroscopic quantum phenomena in magnetic systems

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Podaci o izdanju

69 (18)

2004.

180401(R)-x

objavljeno

1098-0121

Povezanost rada

Fizika

Indeksiranost