Observation of Cu NMR in antiferromagnetic PrBa2Cu3O7: Evidence for hole-band filling.
Observation of Cu NMR in antiferromagnetic PrBa2Cu3O7: Evidence for hole-band filling.
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反铁磁 PrBa2Cu3O7 中 Cu NMR 的观察：空穴带填充的证据。
DOI：
10.1103/physrevb.42.2688
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Schwegler
中科院分区：
文献类型：
--
作者：
Reyes;Maclaughlin;Takigawa;Hammel;Heffner;Thompson;Crow;Kebede;Mihalisin;Schwegler
Copper nuclear magnetic resonance (NMR) has been observed at plane and chain Cu sites in PrBa{sub 2}Cu{sub 3}O{sub 7}. The field-swept NMR signal from plane Cu sites disappears due to magnetic ordering below {approximately}280 K. In the antiferromagnetic state ({ital T}=1.4 K) quadrupole-split NMR spectra from plane-site Cu nuclei can be fit using an axial electric-field gradient ({nu}{sub {ital Q}}=17{plus minus}2 MHz) and an internal field {ital H}{sub int}=65.2{plus minus}0.2 kOe directed at an angle 79{degree}{plus minus}1{degree} to the {ital c} axis. The observation of plane-Cu magnetism is consistent with the absence of doped holes on CuO{sub 2} planes in PrBa{sub 2}Cu{sub 3}O{sub 7}, which supports the view that hole filling is important in suppressing superconductivity in Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7}.
Copper nuclear magnetic resonance (NMR) has been observed at plane and chain Cu sites in PrBa{sub 2}Cu{sub 3}O{sub 7}. The field-swept NMR signal from plane Cu sites disappears due to magnetic ordering below {approximately}280 K. In the antiferromagnetic state ({ital T}=1.4 K) quadrupole-split NMR spectra from plane-site Cu nuclei can be fit using an axial electric-field gradient ({nu}{sub {ital Q}}=17{plus minus}2 MHz) and an internal field {ital H}{sub int}=65.2{plus minus}0.2 kOe directed at an angle 79{degree}{plus minus}1{degree} to the {ital c} axis. The observation of plane-Cu magnetism is consistent with the absence of doped holes on CuO{sub 2} planes in PrBa{sub 2}Cu{sub 3}O{sub 7}, which supports the view that hole filling is important in suppressing superconductivity in Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7}.