Electron magnetic resonance, neutron diffraction and ac susceptibility study of CaMn 1-x Ru{ x O 3 (x < 0.40) manganite system

A. I. Shames; E. Rozenberg; C. Martin; A. Maignan; B. Raveau; G. André; G. Gorodetsky

doi:10.1007/s10948-006-0218-z

Electron magnetic resonance, neutron diffraction and ac susceptibility study of CaMn _1-x Ru{ _x O ₃ (x < 0.40) manganite system

A. I. Shames, E. Rozenberg, C. Martin, A. Maignan, B. Raveau, G. André, G. Gorodetsky

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Electron magnetic resonance (EMR), neutron powder diffraction (NPD) and ac susceptibility techniques were employed for studying the crystallographic structure and magnetic ordering in CaMn _1-xRu _xO ₃ (x < 0.40) manganite system. EMR measurements were done on polycrystalline samples at 120 < T < 500 K. High temperature EMR spectra of pristine antiferromagnetic (AFM) CaMnO ₃ show a singlet Lorentzian-like line, whose intensity diminishes, zeroing at Neel temperature T _N=120 K. Strong broadening of paramagnetic (PM) lines with increase of Ru-content (Δ H _pp ∼ 1 T for x=0.10) was found. Upon cooling low-doped (x ≤ 0.06) samples remain AFM, whereas higher doped ones (0.10 ≤ x ≤ 0.40) clearly show progressive appearance of ferromagnetic (FM) phases. Thus, EMR evidences that Ru-doping modifies both PM and AFM states and creates an inhomogeneous phase separated FM and AFM ground states at x0.06. Complementary measurements of NPD and ac susceptibility corroborate the complex character of magnetic ordering, revealed by EMR. The changes of the magnetic ordering in CaMn _1-xRu _xO ₃ supposed to be solely determined by doping of Mn-sites with Ru.

Original language	English
Pages (from-to)	99-103
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	20
Issue number	2 SPECIAL ISSUE
DOIs	https://doi.org/10.1007/s10948-006-0218-z
State	Published - 1 Feb 2007
Externally published	Yes

Keywords

Doped manganites
Ferromagnetic and electron paramagnetic resonance
Neutron powder diffraction
Phase separation
ac magnetic susceptibility

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-006-0218-z

Cite this

@article{4ac273693795482b913afedbf78db1f1,

title = "Electron magnetic resonance, neutron diffraction and ac susceptibility study of CaMn 1-x Ru\{ x O 3 (x < 0.40) manganite system",

abstract = "Electron magnetic resonance (EMR), neutron powder diffraction (NPD) and ac susceptibility techniques were employed for studying the crystallographic structure and magnetic ordering in CaMn 1-xRu xO 3 (x < 0.40) manganite system. EMR measurements were done on polycrystalline samples at 120 < T < 500 K. High temperature EMR spectra of pristine antiferromagnetic (AFM) CaMnO 3 show a singlet Lorentzian-like line, whose intensity diminishes, zeroing at Neel temperature T N=120 K. Strong broadening of paramagnetic (PM) lines with increase of Ru-content (Δ H pp ∼ 1 T for x=0.10) was found. Upon cooling low-doped (x ≤ 0.06) samples remain AFM, whereas higher doped ones (0.10 ≤ x ≤ 0.40) clearly show progressive appearance of ferromagnetic (FM) phases. Thus, EMR evidences that Ru-doping modifies both PM and AFM states and creates an inhomogeneous phase separated FM and AFM ground states at x0.06. Complementary measurements of NPD and ac susceptibility corroborate the complex character of magnetic ordering, revealed by EMR. The changes of the magnetic ordering in CaMn 1-xRu xO 3 supposed to be solely determined by doping of Mn-sites with Ru.",

keywords = "Doped manganites, Ferromagnetic and electron paramagnetic resonance, Neutron powder diffraction, Phase separation, ac magnetic susceptibility",

author = "Shames, \{A. I.\} and E. Rozenberg and C. Martin and A. Maignan and B. Raveau and G. Andr{\'e} and G. Gorodetsky",

note = "Funding Information: raeli Science Foundation administered by the Israel Academy of Sciences and Humanities for the support of this work (grants 209/01 and 485/05).",

year = "2007",

month = feb,

day = "1",

doi = "10.1007/s10948-006-0218-z",

language = "English",

volume = "20",

pages = "99--103",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "2 SPECIAL ISSUE",

}

TY - JOUR

T1 - Electron magnetic resonance, neutron diffraction and ac susceptibility study of CaMn 1-x Ru{ x O 3 (x < 0.40) manganite system

AU - Shames, A. I.

AU - Rozenberg, E.

AU - Martin, C.

AU - Maignan, A.

AU - Raveau, B.

AU - André, G.

AU - Gorodetsky, G.

N1 - Funding Information: raeli Science Foundation administered by the Israel Academy of Sciences and Humanities for the support of this work (grants 209/01 and 485/05).

PY - 2007/2/1

Y1 - 2007/2/1

N2 - Electron magnetic resonance (EMR), neutron powder diffraction (NPD) and ac susceptibility techniques were employed for studying the crystallographic structure and magnetic ordering in CaMn 1-xRu xO 3 (x < 0.40) manganite system. EMR measurements were done on polycrystalline samples at 120 < T < 500 K. High temperature EMR spectra of pristine antiferromagnetic (AFM) CaMnO 3 show a singlet Lorentzian-like line, whose intensity diminishes, zeroing at Neel temperature T N=120 K. Strong broadening of paramagnetic (PM) lines with increase of Ru-content (Δ H pp ∼ 1 T for x=0.10) was found. Upon cooling low-doped (x ≤ 0.06) samples remain AFM, whereas higher doped ones (0.10 ≤ x ≤ 0.40) clearly show progressive appearance of ferromagnetic (FM) phases. Thus, EMR evidences that Ru-doping modifies both PM and AFM states and creates an inhomogeneous phase separated FM and AFM ground states at x0.06. Complementary measurements of NPD and ac susceptibility corroborate the complex character of magnetic ordering, revealed by EMR. The changes of the magnetic ordering in CaMn 1-xRu xO 3 supposed to be solely determined by doping of Mn-sites with Ru.

AB - Electron magnetic resonance (EMR), neutron powder diffraction (NPD) and ac susceptibility techniques were employed for studying the crystallographic structure and magnetic ordering in CaMn 1-xRu xO 3 (x < 0.40) manganite system. EMR measurements were done on polycrystalline samples at 120 < T < 500 K. High temperature EMR spectra of pristine antiferromagnetic (AFM) CaMnO 3 show a singlet Lorentzian-like line, whose intensity diminishes, zeroing at Neel temperature T N=120 K. Strong broadening of paramagnetic (PM) lines with increase of Ru-content (Δ H pp ∼ 1 T for x=0.10) was found. Upon cooling low-doped (x ≤ 0.06) samples remain AFM, whereas higher doped ones (0.10 ≤ x ≤ 0.40) clearly show progressive appearance of ferromagnetic (FM) phases. Thus, EMR evidences that Ru-doping modifies both PM and AFM states and creates an inhomogeneous phase separated FM and AFM ground states at x0.06. Complementary measurements of NPD and ac susceptibility corroborate the complex character of magnetic ordering, revealed by EMR. The changes of the magnetic ordering in CaMn 1-xRu xO 3 supposed to be solely determined by doping of Mn-sites with Ru.

KW - Doped manganites

KW - Ferromagnetic and electron paramagnetic resonance

KW - Neutron powder diffraction

KW - Phase separation

KW - ac magnetic susceptibility

UR - https://www.scopus.com/pages/publications/33847383334

U2 - 10.1007/s10948-006-0218-z

DO - 10.1007/s10948-006-0218-z

M3 - Article

AN - SCOPUS:33847383334

SN - 1557-1939

VL - 20

SP - 99

EP - 103

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 2 SPECIAL ISSUE

ER -