Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films
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2010
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Signatures of antiferromagnetism (AF) in the underdoped Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family are observed even for doping levels for which superconductivity exists. We have looked for a similar property in a different electron-doped cuprate family, Sr1-xLaxCuO2, which consists of CuO2 planes separated by Sr/La atoms, and is exempt of the possible influence of magnetic rare-earth ions. We report in-plane magneto-resistance measurements in the normal state of underdoped, superconducting, c- axis oriented, epitaxial Sr1-xLaxCuO2 thin films. This probe is sensitive to spin arrangement and we find that the in-plane magnetoresistance, which is negative and does not saturate for H lt = 6 T, exhibits an angular dependence when measured upon rotating a magnetic field within the CuO2 planes. The analysis reveals a superposition of fourfold and twofold angular oscillations. Both of these increase in amplitude with increasing field and decreasing T and appear below a temperature T-onset, wh...ich gets higher with decreasing doping levels. Our results demonstrate that these magnetoresistance oscillations, also observed for the Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family and attributed to an AF signature, are, without ambiguity, a property of CuO2 planes. Besides, these oscillations vary with doping in an unusual way compared to previous results: fourfold oscillations are essentially present in the more underdoped samples while only twofold oscillations are visible in the less underdoped ones. This intriguing observation appears to be a consequence of spin dilution with increasing doping level.
Ključne reči:
superconductors / electron-doped cuprate / epitaxial thin films / magnetotransport / high magnetic fieldsIzvor:
Physical Review B, 2010, 81, 13Izdavač:
- Amer Physical Soc, College Pk
Finansiranje / projekti:
- E. C. under an ESRT Marie Curie Program [MEST-CT-2004-514307]
DOI: 10.1103/PhysRevB.81.134520
ISSN: 1098-0121
WoS: 000277207900095
Scopus: 2-s2.0-77955189539
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Jovanović, Vladimir AU - Fruchter, L. AU - Li, Z. Z. AU - Raffy, H. PY - 2010 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/380 AB - Signatures of antiferromagnetism (AF) in the underdoped Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family are observed even for doping levels for which superconductivity exists. We have looked for a similar property in a different electron-doped cuprate family, Sr1-xLaxCuO2, which consists of CuO2 planes separated by Sr/La atoms, and is exempt of the possible influence of magnetic rare-earth ions. We report in-plane magneto-resistance measurements in the normal state of underdoped, superconducting, c- axis oriented, epitaxial Sr1-xLaxCuO2 thin films. This probe is sensitive to spin arrangement and we find that the in-plane magnetoresistance, which is negative and does not saturate for H lt = 6 T, exhibits an angular dependence when measured upon rotating a magnetic field within the CuO2 planes. The analysis reveals a superposition of fourfold and twofold angular oscillations. Both of these increase in amplitude with increasing field and decreasing T and appear below a temperature T-onset, which gets higher with decreasing doping levels. Our results demonstrate that these magnetoresistance oscillations, also observed for the Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family and attributed to an AF signature, are, without ambiguity, a property of CuO2 planes. Besides, these oscillations vary with doping in an unusual way compared to previous results: fourfold oscillations are essentially present in the more underdoped samples while only twofold oscillations are visible in the less underdoped ones. This intriguing observation appears to be a consequence of spin dilution with increasing doping level. PB - Amer Physical Soc, College Pk T2 - Physical Review B T1 - Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films IS - 13 VL - 81 DO - 10.1103/PhysRevB.81.134520 ER -
@article{ author = "Jovanović, Vladimir and Fruchter, L. and Li, Z. Z. and Raffy, H.", year = "2010", abstract = "Signatures of antiferromagnetism (AF) in the underdoped Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family are observed even for doping levels for which superconductivity exists. We have looked for a similar property in a different electron-doped cuprate family, Sr1-xLaxCuO2, which consists of CuO2 planes separated by Sr/La atoms, and is exempt of the possible influence of magnetic rare-earth ions. We report in-plane magneto-resistance measurements in the normal state of underdoped, superconducting, c- axis oriented, epitaxial Sr1-xLaxCuO2 thin films. This probe is sensitive to spin arrangement and we find that the in-plane magnetoresistance, which is negative and does not saturate for H lt = 6 T, exhibits an angular dependence when measured upon rotating a magnetic field within the CuO2 planes. The analysis reveals a superposition of fourfold and twofold angular oscillations. Both of these increase in amplitude with increasing field and decreasing T and appear below a temperature T-onset, which gets higher with decreasing doping levels. Our results demonstrate that these magnetoresistance oscillations, also observed for the Ln(2-x)Ce(x)CuO(4) (Ln=Nd, Pr, ...) family and attributed to an AF signature, are, without ambiguity, a property of CuO2 planes. Besides, these oscillations vary with doping in an unusual way compared to previous results: fourfold oscillations are essentially present in the more underdoped samples while only twofold oscillations are visible in the less underdoped ones. This intriguing observation appears to be a consequence of spin dilution with increasing doping level.", publisher = "Amer Physical Soc, College Pk", journal = "Physical Review B", title = "Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films", number = "13", volume = "81", doi = "10.1103/PhysRevB.81.134520" }
Jovanović, V., Fruchter, L., Li, Z. Z.,& Raffy, H.. (2010). Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films. in Physical Review B Amer Physical Soc, College Pk., 81(13). https://doi.org/10.1103/PhysRevB.81.134520
Jovanović V, Fruchter L, Li ZZ, Raffy H. Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films. in Physical Review B. 2010;81(13). doi:10.1103/PhysRevB.81.134520 .
Jovanović, Vladimir, Fruchter, L., Li, Z. Z., Raffy, H., "Anisotropy of the in-plane angular magnetoresistance of electron-doped Sr1-xLaxCuO2 thin films" in Physical Review B, 81, no. 13 (2010), https://doi.org/10.1103/PhysRevB.81.134520 . .