Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi2B2C

S. M. Choi; J. W. Lynn; D. Lopez; P. L. Gammel; P. C. Canfield

doi:10.1103/PhysRevLett.87.107001

Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi₂B₂C

S. M. Choi, J. W. Lynn, D. Lopez, P. L. Gammel, P. C. Canfield

Electrical Engineering

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55 Scopus citations

Abstract

Neutron measurements show that superconducting ErNi2B2C (T_C = 11 K) develops antiferromagnetic spin density wave magnetic order (T_N = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below TWFM = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (∼3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.

Original language	English (US)
Journal	Physical review letters
Volume	87
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.87.107001
State	Published - 2001

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.87.107001

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title = "Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi2B2C",

abstract = "Neutron measurements show that superconducting ErNi2B2C (TC = 11 K) develops antiferromagnetic spin density wave magnetic order (TN = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below TWFM = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (∼3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.",

author = "Choi, {S. M.} and Lynn, {J. W.} and D. Lopez and Gammel, {P. L.} and Canfield, {P. C.}",

year = "2001",

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language = "English (US)",

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T1 - Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi2B2C

AU - Choi, S. M.

AU - Lynn, J. W.

AU - Lopez, D.

AU - Gammel, P. L.

AU - Canfield, P. C.

PY - 2001

Y1 - 2001

N2 - Neutron measurements show that superconducting ErNi2B2C (TC = 11 K) develops antiferromagnetic spin density wave magnetic order (TN = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below TWFM = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (∼3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.

AB - Neutron measurements show that superconducting ErNi2B2C (TC = 11 K) develops antiferromagnetic spin density wave magnetic order (TN = 6 K), which squares up with decreasing temperature yielding a series of higher-order magnetic Bragg peaks with odd harmonics. Below TWFM = 2.3 K where magnetization indicates a net moment develops, even-order Bragg peaks develop which low field (∼3 Oe) polarized beam measurements show are magnetic in origin. The data directly demonstrate the existence of a net magnetization with a periodicity of 20a, confirming the microscopic coexistence of spontaneous weak ferromagnetism with superconductivity.

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Direct Observation of Spontaneous Weak Ferromagnetism in the Superconductor ErNi₂B₂C

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