Method for detecting anisotropy of lanthanum calcium manganese oxygen based on terahertz waves

• Main Authors: ZHANG PENG, SU FUHAI, CHEN FUJUN, YAO RUXIAN, MEI HONGYING
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for detecting anisotropy of lanthanum calcium manganese oxygen based on terahertz waves. The method comprises the following steps of testing a sample under two conditions that a magnetic field is perpendicular to the surface of the sample and the magnetic field is parallel to the surface of the sample by utilizing electromagnetic waves in the terahertz frequency band in order to obtain a time-domain terahertz transmitted spectrum changing along with the magnetic field of the lanthanum calcium manganese oxygen under the conditions of 210K, 105 k and 30K; and recording terahertz peak values under the corresponding temperature and the magnetic field. According to the method, a change relation of the terahertz peak values at different temperatures along with the magnetic field is drawn, so that the anisotropy of the sample at different temperature and the lanthanum calcium manganese oxygen in different directions of magnetic field configuration is obtainedthrough an optical method