Magnetic Properties at Surface Boundary of a Half-Metallic Ferromagnet <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>La</mi></mrow><mrow><mn>0.7</mn></mrow></msub></mrow><mrow><msub><mrow><mi>Sr</mi></mrow><mrow><mn>0.3</mn></mrow></msub></mrow><mrow><msub><mrow><mi>MnO</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>

J.-H. Park; E. Vescovo; H.-J. Kim; C. Kwon; R. Ramesh; T. Venkatesan

doi:10.1103/PhysRevLett.81.1953

Magnetic Properties at Surface Boundary of a Half-Metallic Ferromagnet ${La}_{0.7} {Sr}_{0.3} {MnO}_{3}$

J.-H. Park, E. Vescovo, H.-J. Kim, C. Kwon, R. Ramesh, and T. Venkatesan

Phys. Rev. Lett. 81, 1953 – Published 31 August 1998

Abstract

The surface-boundary magnetization $(M_{SB})$ for a manganese perovskite ${La}_{0.7} {Sr}_{0.3} {MnO}_{3}$ has been investigated using spin-resolved photoemission spectroscopy, which has an $\sim 5 Å$ probing depth. $M_{SB}$ shows the full moment at very low temperature but decays much faster than the bulk magnetization $(M_{B})$ upon heating. This result provides direct insight into various novel properties at grain and surface boundaries observed in the polycrystalline samples and junctions of manganese perovskites.

Received 2 March 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.1953

Authors & Affiliations

J.-H. Park¹, E. Vescovo¹, H.-J. Kim¹, C. Kwon^2,*, R. Ramesh², and T. Venkatesan²

¹National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973-5000
²Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742