Magnetic properties of the mixed-valence manganese oxide Pb(3)Mn(7)O(15)

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.1088/0953-8984/20/5/055217

Ключевые слова: Crystal structure, Magnetization, Manganese compounds, Phase interfaces, X ray diffraction, Manganese oxide, Space groups, Temperature range, Single crystals

Аннотация: A Pb(3)Mn(7)O(15) single crystal has been grown by the flux method and studied using x-ray diffraction and magnetization measurements. The crystal is hexagonal (P6(3)/mcm space group, Z = 4) and exhibits a pronounced layered nature. Along the [001] direction (c axis), the structure consists of layers of edge-sharing MnO(6) octahedra. Pairs of Mn atoms occupy the octahedral sites located between layers forming 'bridges' along the c axis, which link neighboring Mn layers. The magnetic properties of the crystal have been investigated using ac and dc magnetization measurements in the temperature range 2-900 K at magnetic fields up to 90 kOe. The experimental data obtained suggest that in the temperature region under study several different magnetic phases can be distinguished. Down to similar to 250 K, the crystal is in the paramagnetic state. Below this temperature, short-range antiferromagnetic ordering apparently starts forming within Mn layers, although a transition to long-range magnetic order occurs at 70 K. The magnetization data obtained leads us to conclude that this state is canted antiferromagnetic with moments lying in the basal plane of the crystal. In addition, below 20 K the crystal undergoes one more magnetic transition that corresponds to spin reorientation.

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Издание

Журнал: JOURNAL OF PHYSICS-CONDENSED MATTER

Выпуск журнала: Vol. 20, Is. 5

ISSN журнала: 09538984

Место издания: BRISTOL

Издатель: IOP PUBLISHING LTD

Авторы

  • Volkov N.V. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Dept Phys, Krasnoyarsk 660036, Russia)
  • Sablina K.A. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Bayukov O.A. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Eremin E.V. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Petrakovskii G.A. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Dept Phys, Krasnoyarsk 660036, Russia)
  • Velikanov D.A. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Balaev A.D. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Bovina A.F. (RAS, SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Boeni P. (Tech Univ Munich, Dept Phys E21, D-85747 Garching, Germany)
  • Clementyev E. (RFNC Inst Tech Phys, Snezhinsk 456770, Russia)

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