Positive exchange bias from magnetization reversal in La1−xPrxCrO3 (x ∼ 0.7–0.85)
Positive exchange bias from magnetization reversal in La1−xPrxCrO3 (x ∼ 0.7–0.85)
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DOI：
10.1063/1.3644473
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发表时间：
2011-10
影响因子：
4
通讯作者：
K. Yoshii
中科院分区：
文献类型：
--
作者：
K. Yoshii
由于Pr3+-Cr3+的反平行耦合，钙钛矿型铬铁矿La1−xPrxCrO3表现出与磁化反转相关的反常正交换偏置和负交换偏置。在∼200K以下，改变冷却磁场可以切换EB的类型。PEB出现在低冷场(<；3-15 kOe)，与Pr位置的内部磁场相当。PEB或NEB的出现取决于Pr3+力矩相对于倾斜的Cr3+组分的取向。
The perovskite chromite La1−xPrxCrO3 shows an unusual positive exchange bias (PEB) and a negative exchange bias (NEB) associated with magnetization reversal, arising from an antiparallel Pr3+-Cr3+ coupling. Below ∼200 K, changing the cooling magnetic field switches the type of EB. A PEB appears in low cooling fields (<3–15 kOe), comparable with the internal magnetic field at the Pr site. The appearance of PEB or NEB depends on the orientation of the Pr3+ moment with respect to the canted Cr3+ component.