Napredna pretraga

Pregled bibliografske jedinice broj: 330561

Crystal structure and magnetic properties of the new cobalt tellurite halide Co5(TeO3)4X2 (X=Cl, Br)


Becker, Richard; Prester, Mladen; Berger, Helmuth; Johnsson, Mats; Drobac, Djuro; Živković, Ivica
Crystal structure and magnetic properties of the new cobalt tellurite halide Co5(TeO3)4X2 (X=Cl, Br) // Solid State Sciences, 9 (2007), 3-4; 223-230 doi:10.1016/j.solidstatesciences.2006.11.019 (međunarodna recenzija, članak, znanstveni)


Naslov
Crystal structure and magnetic properties of the new cobalt tellurite halide Co5(TeO3)4X2 (X=Cl, Br)

Autori
Becker, Richard ; Prester, Mladen ; Berger, Helmuth ; Johnsson, Mats ; Drobac, Djuro ; Živković, Ivica

Izvornik
Solid State Sciences (1293-2558) 9 (2007), 3-4; 223-230

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Oxohalide; Lone-pair elements; Crystal structure determination; Antiferromagnetism; Magnetic susceptibility

Sažetak
Two new cobalt tellurite halides Co5(TeO3)4Cl2 and Co5(TeO3)4Br2 have been synthesized and found to be iso-structural with Ni5(TeO3)4X2 (X=Cl, Br). Co5(TeO3)4X2 crystallizes in the monoclinic system space group C2/c, and the Br-phase has the lattice parameters a=20.440(1) A, b=5.2760(2) A, c=16.4710(7) A, beta=124.790(5) degrees, and Z=4. The crystal structures were solved from single-crystal Xray data, R1=1.90 and 1.77, respectively, for the Cl- and Br-phases. The crystal structure is layered with only weak van der Waals’ interactions in between the layers. The layers are built by large [Co5O16X2] groups consisting of five edge- and face-sharing Co-octahedra. Each group is connected to adjacent groups via corner sharing through common oxygen atoms as well as through [TeO3E] groups. Magnetic susceptibility measurements on oriented single crystals reveal pronounced anisotropy in a broad temperature range and clear signs of antiferromagnetic ordering at low temperatures. Anisotropic susceptibility of an iso-structural Ni-based compound was also studied and compared with the corresponding results of Co5(TeO3)4X2. Magnetic anisotropy is discussed in framework of single-ion anisotropy effects.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352843-2845 - Kvantni magneti: Osnovna stanja u kompeticiji (Mladen Prester, )

Ustanove
Institut za fiziku, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • SCI, SCI exp.


Citati