Observation of minority spin character of the new electron doped manganite La_0.7Ce_0.3MnO_3 from tunneling magnetoresistance

Abstract

We report the magnetotransport characteristics of a trilayer ferromagnetic tunnel junction build of an electron doped manganite (La_0.7Ce_0.3MnO_3) and a hole doped manganite (La_0.7Ca_0.3MnO_3). At low temperatures the junction exhibits a large positive tunneling magnetoresistance (TMR), irrespective of the bias voltage. At intermediate temperatures below T_C the sign of the TMR is dependent on the bias voltage across the junction. The magnetoresistive characteristics of the junction strongly suggest that La_0.7Ce_0.3MnO_3 is a minority spin carrier ferromagnet with a high degree of spin polarization, i.e. a transport half metal.

4 pages, 3 figures, 2nd revised version

References in corpus (1)

• A 'p-n' diode with hole and electron-doped lanthanum manganite

Cited by in corpus (12)

• Direct observation of electron doping in La0.7Ce0.3MnO3 using x-ray absorption spectroscopy
• Magnetocapacitance and exponential magnetoresistance in manganite-titanate heterojunctions
• Colossal Magnetoresistance Manganites and Related Prototype Devices
• Photoemission and x-ray absorption spectroscopy study of electron-doped colossal magnetoresistance manganite: La0.7Ce0.3MnO3 film
• GaN / VO2 heteroepitaxial p-n junctions: Band offset and minority carrier dynamics
• Effects of the On-Site Coulomb Repulsion in Double Exchange Magnets
• Electronic structure and transport properties of La_0.7Ce_0.3MnO_3
• Anomalous bias dependence of tunnel magnetoresistance in a magnetic tunnel junction
• Electrical-transport characteristics of as-grown and oxygen-reduced La${}_{0.7}$Ce${}_{0.3}$MnO${}_3$ films: calculation of hopping energies, Mn valences, and carrier localization lengths
• New Correlated Model of Colossal Magnetoresistive Manganese Oxides
• Epitaxial stabilization of ultra thin films of electron doped manganites
• Mn${}^{2+}$/Mn${}^{3+}$ state of La${}_{0.7}$Ce${}_{0.3}$MnO${}_3$ by oxygen reduction and photodoping