Field-temperature phase diagram of magnetic bubbles spanning charge/ orbital ordered and metallic phases in La1-xSrxMnO3 (x=0.125)
Field-temperature phase diagram of magnetic bubbles spanning charge/ orbital ordered and metallic phases in La1-xSrxMnO3 (x=0.125)
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DOI：
10.1103/physrevb.95.144403
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发表时间：
2017-04-04
影响因子：
3.7
通讯作者：
Mori, S.
中科院分区：
文献类型：
--
作者：
Kotani, A.;Nakajima, H.;Mori, S.
我们报道了当x=0.125时，La_(1-x)Sr_xMnO_3铁磁(FM)相的磁性织构的形成；这些织构是磁泡、磁条磁畴和强迫FM态。Lorentz显微镜(LM)的原位观察表明，随着电荷/轨道有序(CO/OO)的形成，F绝缘相中存在磁泡。此外，在TECO/OO(T-CO=155K)和FM(T-C=190K)转变温度之间的中温区仍然存在稳定的磁泡。这些磁泡被认为来自于FM相中的磁晶各向异性和偶极-偶极相互作用。基于对磁场随温度和外加磁场强度的变化关系的原位光学显微镜观察，建立了磁场-温度相图，展示了La0.875Sr0.125MnO_3调频相中磁泡的稳定区。
We report formation of magnetic textures in the ferromagnetic (FM) phase of La1-xSrxMnO3 for x = 0.125; these textures are magnetic bubbles, magnetic stripe domains, and forced FM states. In situ Lorentz microscopy (LM) observations showthat magnetic bubbles exist in theFMinsulating phase accompanying the formation of the charge/orbital ordering (CO/OO). Furthermore, stable magnetic bubbles still exist in an intermediate temperature region between theCO/OO (T-CO = 155 K) and FM(T-C = 190 K) transition temperatures. Thesemagnetic bubbles are believed to originate from the magnetocrystalline anisotropy and the dipole-dipole interaction in theFMphase. Based on in situ LM observations as a function of both temperature and the strength of the external magnetic field applied, a magnetic field-temperature phase diagram is constructed, exhibiting the stabilizing regions of the magnetic bubbles in the FM phase of La0.875Sr0.125MnO3.