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Chemical phase diagrams for the YBa2Cu3O7 family

Karen, Pavel; Braaten, O.; Kjekshus, Arne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)

Magnetic properties of YBaCuCoO5

Karen, Pavel; Kjekshus, Arne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1993)

Neutron-powder-diffraction study of the nuclear and magnetic structures of the substitution compound (Y1−xCax)Ba2Fe3O8+d (x = 0.05, 0.10 and 0.20)

Natali-Sora, I.; Huang, Q.; Lynn, J.W.; Rosov, N.; Karen, Pavel; Kjekshus, Arne; Karen, V.L.; Mighell, A.D.; Santoro, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)

The nuclear and magnetic structures of ( Y 1 − x Ca x ) Ba 2 Fe 3 O 8 + δ with x=0.05, 0.10, and 0.20 have been investigated by neutron-powder diffraction at room temperature. The compound crystallizes with the symmetry ...

Superconducting and structural properties of Sr-substituted YBa2Cu4O8

Karen, Pavel; Kjekshus, Arne; Andresen, P.H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)

On phase relations, structural and magnetic properties of the stable manganese carbides Mn23C6, Mn5C2 and Mn7C3

Karen, Pavel; Fjellvåg, Helmer; Kjekshus, Arne; Andresen, P.H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1991)

Crystal structure of ScCl3

Fjellvåg, Helmer; Karen, Pavel (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)

Neutron-powder-diffraction study of the nuclear and magnetic structures of YBa2Fe3O8 at room temperature

Huang, Q.; Karen, Pavel; Karen, V.L.; Kjekshus, Arne; Lynn, J.W.; Mighell, A.D.; Rosov, N.; Santoro, A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)

The nuclear and magnetic structures of YBa 2 Fe 3 O 8 have been investigated by powder neutron diffraction at room temperature. The nuclear structure of the compound has the symmetry of space group P4/mmm and lattice ...

Substitution for copper in YBa2Cu3O9−d by 3d- and pre-transition metals

Andresen, P.H.; Fjellvåg, Helmer; Karen, Pavel; Kjekshus, Arne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1991)

Lanthanide substitution in YBa2Cu3O9−d

Karen, Pavel; Fjellvåg, Helmer; Braaten, O.; Kjekshus, Arne; Bratsberg, H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1990)

Valence State Mixing and Separation in SmBaFe<SUB>2</SUB>O<SUB>5+w</SUB>

Lindén, Johan; Karen, Pavel; Kjekshus, Arne; Miettinen, J.; Pietari, T.; Karppinen, Maarit (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1999)

A mixed-valence state, formally denoted as Fe 2 . 5 + , is observed in the 300 K Mössbauer spectra of the most reduced samples of SmBaFe 2 O 5 + w . Upon cooling below the Verwey-type transition temperature (TV≈ 200 K ) ...

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