Magnetism of CaB2C2

T Mori, S Otani - Journal of the Physical Society of Japan, 2002 - journals.jps.jp
Previously high temperature ferromagnetism was reported to occur in lanthanum doped
CaB6, 1) attracting interest due to the conventionally non-magnetic character of the …

Extrinsic Origin of High-Temperature Ferromagnetism in CaB6

K Matsubayashi, M Maki, T Moriwaka… - Journal of the Physical …, 2003 - journals.jps.jp
The discovery of ferromagnetism in CaB 6 doped with La was surprising, because there is
no magnetic element in the compound nevertheless the system involved a ferromagnetic …

Ferromagnetism in lanthanum doped CaB6: is it intrinsic?

T Mori, S Otani - Solid state communications, 2002 - Elsevier
Magnetism of flux grown single crystals of undoped and lanthanum doped Ca1− xLaxB6
was systematically investigated, taking especial care in the preparation and quality control of …

Ferromagnetism Induced by Ca Vacancy in CaB 6

T Moriwaka, T Nishioka, NK Sato - Journal of the Physical Society of …, 2001 - journals.jps.jp
CaB 6 doped with a La atom, Ca 1-x La x B 6, is a ferromagnet, but the magnetic and
transport properties of the nondoped mother material, CaB 6, remain unclear. In order to …

High-Temperature Ferromagnetism in CaB2C2

J Akimitsu, K Takenawa, K Suzuki, H Harima… - Science, 2001 - science.org
We report a high Curie–temperature ferromagnet, CaB2C2. Although the compound has
neither transition metal nor rare earth ions, the ferromagnetic transition temperature T c is …

Raman scattering investigation of high temperature ferromagnetic crystals

M Udagawa, S Nagai, N Ogita, F Iga, R Kaji… - journal of the physical …, 2002 - journals.jps.jp
Phonon spectra of ferromagnetic CaB 6 and CaB 2 C 2 have been investigated by Raman
scattering, In CaB 6, a doublet spectrum has been observed for E g phonon and is …

Ferromagnetism vs Paramagnetism and False Quantum Oscillations in Lanthanum-Doped CaB6

T Terashima, C Terakura, Y Umeda… - Journal of the Physical …, 2000 - jstage.jst.go.jp
Magnetization and resistivity were measured as functions of temperature and magnetic field
on two single crystals of CaB6 and three of (Ca0. 995La0. 005) B6. One of the doped …

The nature of Fe impurity phase in ferromagnetic CaB6

M Cao, J Jiang, H Liu, J Yuan - Physica B: Condensed Matter, 2005 - Elsevier
Since the discovery of unexpected ferromagnetism in CaB6, the role of Fe impurity has been
suspected, but its identity has never been properly determined. By an experimental study of …

Flux Growth and Magnetic Properties of CaB6 Crystals

S Otani, T Mori - Journal of the Physical Society of Japan, 2002 - jstage.jst.go.jp
Lanthanum doped calcium hexaboride, Ca1ÀxLaxB6, attracts a lot of interest because of
high temperature weak ferromagnetism though the material consists of no magnetic …

Defect driven magnetism in calcium hexaboride

SE Lofland, B Seaman, KV Ramanujachary, N Hur… - Physical Review B, 2003 - APS
We have completed a systematic investigation of the structural and magnetic properties of
CaB 6 over a wide range of temperatures. Unlike conventional magnetic systems, the …