New possibilities of synchrotron radiation diffraction topography for the investigation of `exotic' magnetic domains
New possibilities of synchrotron radiation diffraction topography for the investigation of `exotic' magnetic domains
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同步加速器辐射衍射形貌研究“奇异”磁域的新可能性
DOI：
10.1088/0022-3727/34/10a/323
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. J. A. Oliveira
中科院分区：
文献类型：
--
作者：
J. Baruchel;P. C. Camargo;H. Klein;I. Mazzaro;J. Nogués;A. J. A. Oliveira
在现代光源上的同步辐射地形，加上适当的CCD探测器，正在产生（在更短的时间内和更好的分辨率）到目前为止只能通过中子地形获得的结果。在ESRF进行的两个关于“奇异”反铁磁畴的例子证明了这一点：(1)使用逆压磁效应对氟化钴中的180°反铁磁畴进行成像：以这种方式研究磁场在冷却和“记忆”效应时的作用，以及(2)使用其相关的弱电荷密度波峰观察铬中的自旋密度波域。证明了表面效应对确定畴型的重要性。
Synchrotron radiation topography on modern sources, coupled with adequate CCD detectors, is producing (in a shorter time and with better resolution) results which could only be obtained, up to now, by using neutron topography. This is shown by two examples, carried out at the ESRF, on `exotic' antiferromagnetic domains: (1) the imaging of 180° antiferromagnetic domains in cobalt fluoride is performed using the inverse piezomagnetic effect: the action of a magnetic field while cooling and `memory' effects are investigated in this way, and (2) the spin density wave domains in chromium are observed using their associated, weak, charge density wave peaks: the importance of the surface effects to determine the domain type is evidenced.