Titanium-III warwickites: A family of one-dimensional disordered magnetic systems

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.16754· OSTI ID:6731434

Fernandes, J C; Guimaraes, R B; Continentino, M A ^[1]; Borges, H A ^[2]; Valarelli, J V ^[3]; Lacerda, A ^[4]

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1. Instituto de Fisica, Universidade Federal Fluminense, Outeiro de S.J. Batista s/n, Niteroi, 24.020, RJ (Brazil)
2. Departamento de Fisica, Pontificia Universidade Catolica do Rio de Janeiro, M. de S. Vicente 225, Rio de Janeiro, 22.452, RJ (Brazil)
3. Instituto de Geociencias, Universidade de Sao Paulo, Caixa Postal 20.899, Sao Paulo, 01498-970, SP (Brazil)
4. National High Magnetic Field Laboratory, Los Alamos, New Mexico 87545 (United States)

We present x-ray, susceptibility, and magnetization (up to 18 T) measurements in the compound MgTiOBO[sub 3], which forms in the structure known as warwickite. This structure is characterized by the presence of ribbons along the [ital c] axis where the metallic ions are located. This system is magnetic since the Ti ions are in the valence state Ti[sup 3+] with the electronic configuration 3[ital d][sup 1]. Its susceptibility has a temperature dependence, at low temperatures, given by [chi]([ital T]) [proportional to] [ital T][sup [minus][alpha]], with the exponent [alpha][approx]0.83. The low-temperature behavior of the magnetization, as a function of field, is described by [ital m] [proportional to] [ital H][sup [gamma]] with [gamma][approx]1[minus][alpha]. These results, together with the x-ray measurements, allow us to identify this material as belonging to a family of inorganic, one-dimensional, disordered magnetic systems.

• OSTI ID: 6731434
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 50:22; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORATES
MAGNETIZATION
MAGNESIUM COMPOUNDS
TITANIUM COMPOUNDS
CRYSTAL STRUCTURE
MAGNETIC SUSCEPTIBILITY
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
BORON COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
MAGNETIC PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360606* - Other Materials- Physical Properties- (1992-)