Limits...
Magnetic properties of solid solutions between BiCrO 3 and BiGaO 3 with perovskite structures

View Article: PubMed Central - PubMed

ABSTRACT

Magnetic properties of BiCr1−xGaxO3 perovskite-type solid solutions are reported, and a magnetic phase diagram is established. As-synthesized BiCrO3 and BiCr0.9Ga0.1O3 crystallize in a monoclinic (m) C2/c structure. The Néel temperature (TN) decreases from 111 K in BiCrO3 to 98 K in BiCr0.9Ga0.1O3, and spin-reorientation transition temperature increases from 72 K in BiCrO3 to 83 K in BiCr0.9Ga0.1O3. o-BiCr0.9Ga0.1O3 with a PbZrO3-type orthorhombic structure is obtained by heating m-BiCr0.9Ga0.1O3 up to 573 K in air; it shows similar magnetic properties with those of m-BiCr0.9Ga0.1O3. TN of BiCr0.8Ga0.2O3 is 81 K, and TN of BiCr0.7Ga0.3O3 is 63 K. Samples with x = 0.4, 0.5, 0.6 and 0.7 crystallize in a polar R3c structure. Long-range antiferromagnetic order with weak ferromagnetism is observed below TN = 56 K in BiCr0.6Ga0.4O3, TN = 36 K in BiCr0.5Ga0.5O3 and TN = 18 K in BiCr0.4Ga0.6O3. BiCr0.3Ga0.7O3 shows a paramagnetic behaviour because the Cr concentration is below the percolation threshold of 31%.

No MeSH data available.


(a) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 and o-BiCr0.9Ga0.1O3 at 5 K. (b) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 at 50 and 90 K. Insert shows details near the origin.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC5036460&req=5

Figure 6: (a) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 and o-BiCr0.9Ga0.1O3 at 5 K. (b) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 at 50 and 90 K. Insert shows details near the origin.

Mentions: Isothermal magnetization curves of BiCr0.9Ga0.1O3 are given on figure 6. They show that a very weak ferromagnetic moment is developed below TN in m-BiCr0.9Ga0.1O3; below TSR, the hysteresis loop becomes more defined. The magnetization reaches 0.074μB/Cr at 5 K and 50 kOe; at 5 K, the remnant magnetization is 0.0177μB/Cr, and the coercitive field is about 1.8 kOe in m-BiCr0.9Ga0.1O3. Very similar M versus H curves were obtained in BiCrO3 [17]. Spin canting angles in BiCrO3 could not be determined from neutron diffraction because of their small values [12, 13].


Magnetic properties of solid solutions between BiCrO 3 and BiGaO 3 with perovskite structures
(a) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 and o-BiCr0.9Ga0.1O3 at 5 K. (b) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 at 50 and 90 K. Insert shows details near the origin.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC5036460&req=5

Figure 6: (a) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 and o-BiCr0.9Ga0.1O3 at 5 K. (b) Isothermal magnetization curves of m-BiCr0.9Ga0.1O3 at 50 and 90 K. Insert shows details near the origin.
Mentions: Isothermal magnetization curves of BiCr0.9Ga0.1O3 are given on figure 6. They show that a very weak ferromagnetic moment is developed below TN in m-BiCr0.9Ga0.1O3; below TSR, the hysteresis loop becomes more defined. The magnetization reaches 0.074μB/Cr at 5 K and 50 kOe; at 5 K, the remnant magnetization is 0.0177μB/Cr, and the coercitive field is about 1.8 kOe in m-BiCr0.9Ga0.1O3. Very similar M versus H curves were obtained in BiCrO3 [17]. Spin canting angles in BiCrO3 could not be determined from neutron diffraction because of their small values [12, 13].

View Article: PubMed Central - PubMed

ABSTRACT

Magnetic properties of BiCr1−xGaxO3 perovskite-type solid solutions are reported, and a magnetic phase diagram is established. As-synthesized BiCrO3 and BiCr0.9Ga0.1O3 crystallize in a monoclinic (m) C2/c structure. The Néel temperature (TN) decreases from 111 K in BiCrO3 to 98 K in BiCr0.9Ga0.1O3, and spin-reorientation transition temperature increases from 72 K in BiCrO3 to 83 K in BiCr0.9Ga0.1O3. o-BiCr0.9Ga0.1O3 with a PbZrO3-type orthorhombic structure is obtained by heating m-BiCr0.9Ga0.1O3 up to 573 K in air; it shows similar magnetic properties with those of m-BiCr0.9Ga0.1O3. TN of BiCr0.8Ga0.2O3 is 81 K, and TN of BiCr0.7Ga0.3O3 is 63 K. Samples with x = 0.4, 0.5, 0.6 and 0.7 crystallize in a polar R3c structure. Long-range antiferromagnetic order with weak ferromagnetism is observed below TN = 56 K in BiCr0.6Ga0.4O3, TN = 36 K in BiCr0.5Ga0.5O3 and TN = 18 K in BiCr0.4Ga0.6O3. BiCr0.3Ga0.7O3 shows a paramagnetic behaviour because the Cr concentration is below the percolation threshold of 31%.

No MeSH data available.