Magnetic-field-induced density of states in MgB2: Spin susceptibility measured by conduction-electron spin resonance

Thumbnail Image
Date
2005-07-01
Authors
Simon, F.
Jánossy, A.
Fehér, T.
Murányi, F.
Garaj, T.
Forró, L.
Petrovic, C.
Bud'ko, Sergey L.
Ribeiro, R. A.
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Authors
Person
Canfield, Paul
Distinguished Professor
Research Projects
Organizational Units
Organizational Unit
Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
Organizational Unit
Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

Journal Issue
Is Version Of
Versions
Series
Abstract
The magnetic-field dependence of the electron spin susceptibility chi(s) was measured in the superconducting state of high-purity MgB2 fine powders from the intensity of the conduction-electron spin resonance at 3.8, 9.4, and 35 GHz. The measurements confirm that a large part of the density of states is restored at low temperatures at fields below 1 T in qualitative agreement with the closing of the pi band gaps in the two-band model. However, the increase of chi(s) with field and temperature is larger than expected from current superconductor models of MgB2.
Comments
This article is published as Simon, Ferenc, András Jánossy, Titusz Fehér, Ferenc Murányi, S. Garaj, L. Forró, C. Petrovic, S. Bud’ko, R. A. Ribeiro, and P. C. Canfield. "Magnetic-field-induced density of states in Mg B 2: Spin susceptibility measured by conduction-electron spin resonance." Physical Review B 72, no. 1 (2005): 012511. DOI: 10.1103/PhysRevB.72.012511. Copyright 2005 American Physical Society. Posted with permission.
Description
Keywords
Citation
DOI
Copyright
Collections