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TbB6 antiferromagnetic state: a macroscopic and microscopic investigation


Amara, Mehdi; Galera, Rose-Marie; Aviani, Ivica; Givord, Françoise.
TbB6 antiferromagnetic state: a macroscopic and microscopic investigation // Physical Review B - Condensed Matter and Materials Physics, 82 (2010), 224411-1 doi:10.1103/PhysRevB.82.224411 (međunarodna recenzija, članak, znanstveni)


Naslov
TbB6 antiferromagnetic state: a macroscopic and microscopic investigation

Autori
Amara, Mehdi ; Galera, Rose-Marie ; Aviani, Ivica ; Givord, Françoise.

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 82 (2010); 224411-1

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

Ključne riječi
Antiferromagnetism; domains; displacement waves; rare-earth hexaborides; magnetostriction; Xray

Sažetak
The antiferromagnetic state of TbB6 has been investigated by means of magnetic susceptibility, magnetostriction and X-ray diffraction measurements on a single crystal. The anisotropy of the magnetic susceptibility and the magnetostriction data point to a tetragonal symmetry in the antiferromagnetic state. Below TN, the X-ray diffraction investigation shows charge satellites, related to the <1/2 0 0> and h <1/2 1/2 0> wave vectors stars, similar to those observed in GdB6. The <1/2 0 0> satellites clearly result from the formation of static atomic displacements waves. The displacive phenomenon is described as a compromise between the exchange coupling and a single-ion elastic energy. This mechanism is shown to be responsible for the recurrence of the h <1/4 1/4 1/2> i magnetic wave vectors in rare-earth hexaborides. A combined analysis of experimental and theoretical data points to only two stable tetragonal models for TbB6 antiferromagnetic structure. This study confirms the influence of exchange displacements in rare-earth hexaborides and highlights the need for a systematic investigation of the magnetic anisotropy of antiferromagnets

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352827-2841 - Materijali sa elektronskom strukturom modeliranom modernim tehnikama priprave (Ivica Aviani, )
035-0352843-2849 - Termoelektrična i termomagnetska svojstva materijala s jakim korelacijama. (Veljko Zlatić, )

Ustanove
Institut za fiziku, Zagreb

Autor s matičnim brojem:
Ivica Aviani, (76256)

Časopis indeksira:


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


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