Weak Electron Irradiation Suppresses the Anomalous Magnetization of N-Doped Diamond Crystals,Physica Status Solidi (B) - Basic Solid State Physics

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Weak Electron Irradiation Suppresses the Anomalous Magnetization of N-Doped Diamond Crystals
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2021-09-01 , DOI: 10.1002/pssb.202100395
Annette Setzer ₁ , Pablo D. Esquinazi ₁ , Olesya Daikos ₂ , Tom Scherzer ₂ , Andreas Pöppl ₃ , Robert Staacke ₄ , Tobias Lühmann ₄ , Sebastien Pezzagna ₄ , Wolfgang Knolle ₂ , Sergei Buga _{5,

6} , Bernd Abel ₂ , Jan Meijer ₄

Affiliation

Several diamond bulk crystals with a concentration of electrically neutral single substitutional nitrogen atoms of ≲80 ppm, the so-called C or P1 centers, are irradiated with electrons at 10 MeV energy and low fluence. The results show a complete suppression of the irreversible behavior in field and temperature of the magnetization below 30 K, after a decrease in ≲40 ppm in the concentration of C centers produced by the electron irradiation. This result indicates that magnetic C centers are at the origin of the large hysteretic behavior found recently in nitrogen-doped diamond crystals. This is remarkable because of the relatively low density of C centers, stressing the extraordinary role of the C centers in triggering those phenomena in diamond at relatively high temperatures. After annealing the samples at high temperatures in vacuum, the hysteretic behavior is partially recovered.

中文翻译：

弱电子辐照抑制 N 掺杂金刚石晶体的异常磁化

几个金刚石块状晶体的电中性单取代氮原子浓度为 ≲ 80 ppm，即所谓的 C 或 P1 中心，用 10 MeV 能量和低能量密度的电子辐照。结果表明，在由电子辐射产生的 C 中心浓度降低 ≲ 40 ppm 后，磁化强度在场和温度中的不可逆行为被完全抑制到 30 K 以下。该结果表明磁性 C 中心是最近在掺氮金刚石晶体中发现的大滞后行为的起源。这是显着的，因为 C 中心的密度相对较低，强调了 C 中心在相对较高的温度下触发钻石中的这些现象的非凡作用。样品在真空中高温退火后，

更新日期：2021-09-01

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