Spontaneous magnetization and magnetic susceptibility of a ferroelectric/ferromagnetic/ferroelastic single domain crystal of nickel bromine boracite Ni3B7O13Br
| Autor: | Jean Muller, Hans Schmid, Gilles Triscone, Shao Yu Mao |
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| Jazyk: | angličtina |
| Rok vydání: | 1999 |
| Předmět: |
Materials science
Condensed matter physics Ferroelectric materials Ferromagnetic materials Magnetic susceptibility ddc:500.2 Triclinic crystal system Condensed Matter Physics Ferroelectric domain Magnetic susceptibility Ferroelectricity Ferroelasticity Electronic Optical and Magnetic Materials Magnetization Phase transition temperature (of ferroelec./ferromagnetic/ferroelastic single domain crystal of nickel bromine boracite) Ferroelastic materials Nuclear magnetic resonance Bromine boracite Magnetism nickel ddc:540 Magnetic transition Orthorhombic crystal system Single domain Spontaneous magnetization Magnetization (spontaneous magnetization and magnetic susceptibility of ferroelec./ferromagnetic/ferroelastic single domain crystal of nickel bromine boracite) Boracite Magnetic domain |
| Zdroj: | Journal of Magnetism and Magnetic Materials, Vol. 195, No 1 (1999) pp. 65-75 |
| ISSN: | 0304-8853 |
| Popis: | Using a SQUID magnetometer, the magnetic field-induced magnetization has been measured on a ferroelastically `poled’ orthorhombic ferroelectric/ferroelastic single domain of Ni3B7O13Br. Measurements were performed along the three principal orthorhombic crystallographic axis directions at 0.5, 1.0, 3.0, and 5.0 kOe in the range 4–40 K, and at 10 kOe in the range 4–300 K. The corresponding magnetic susceptibilities have been derived. The sequence of magnetic phases at low temperature, their magnetic point groups and transition temperatures Tc1=30 K and Tc2=21 K have been confirmed: mm21′⇐Tc1⇒m′m2′⇐Tc2⇒1. In the weakly ferromagnetic/ferroelectric/ferroelastic orthorhombic phase with Shubnikov–Heesch point group m′m2′ in the range 21 K M s lies along the orthorhombic b0-axis, with a value of M s =0.71 emu/g at 25 K. In the triclinic phase with point group 1, below Tc2=21 K, M s assumes a temperature-dependent crystallographic general direction lying nearly in the pseudo-orthorhombic (0 0 1)0-plane, for example at 5 K with a value of M s =(2.7 a 0 +1.76 b 0 +0.34 c 0 ) emu/g. |
| Databáze: | OpenAIRE |
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