Published August 2002 | Version v1
Journal article Metadata-only

Mechanism of 4f-5d-hybridization in Sm1-xRxS (R = Ce, Gd, Y) systems with fluctuation valence

Creators

  • 1. Peterburgskij Inst. Yadernoj Fiziki im. B.P. Konstantinova RAN, Gatchina, Leningradskaya Obl. (Russian Federation)
  • 2. Fiziko-Tekhnicheskij Inst. im. A.F. Ioffe RAN, Sankt-Peterburg (Russian Federation)

Description

In Sm1-xRxS (R = Ce, Gd, Y) systems with fluctuation valence (FV) one determined using method of shifts of X-ray lines the population of 4f-states (valence) of Sm, as well as, populations of 5d-states of Ce and Gd and 4d-states of Y. One detected that in all the systems after transition to FV state Sm valence increase from m ≅ 2.5 (0.15 < x < 0.25) up to m ≅ 2.65 (x ≅ 0.8) and then decreased. In that case, populations of d-states of Ce, Gd and Y remained practically stable within the whole range of compositions. The experimental dependence of Sm valence on composition is explained in the assumption that its 4f-electron is hybridized by two channels: with 5d-electron of neighboring Sm atom and with 5d-electron of eigenatom

Abstract (Russian)

В системах промежуточной валентности (ПВ) Sm1-xRxS (R = Ce, Gd, Y) методом смещений рентгеновских линий определена заселенность 4f-состояний (валентность) Sm, а также заселенности 5d-состояний Ce и Gd и 4d-состояний Y. Обнаружено, что во всех системах после перехода в состояние ПВ валентность Sm увеличивается от m ≅ 2.5 (0.15 < x < 0.25) до m ≅ 2.65 (x ≅ 0.8) и далее уменьшается. При этом заселенности d-состояний Ce, Gd и Y остаются практически неизменными во всей области составов. Экспериментальная зависимость валентности Sm от состава объяснена в предположении, что его 4f-электрон гибридизуется по двум каналам: с 5d-электроном соседнего атома Sm и с 5d-электроном собственного атома

Additional details

Additional titles

Original title (Russian)
Механизм 4f-5d-гибридизации в системах промежуточной валентности См

Publishing Information

Journal Title
Fizika Tverdogo Tela
Journal Volume
44
Journal Issue
8
Journal Page Range
p. 1498-1500
ISSN
0367-3294
CODEN
FTVTAC

Conference

Title
11. Feofilov symposium. Spectroscopy of crystals activated by rare earth ions and transition metal ions
Original Conference Title
XI Feofilovskij simpozium. Spektroskopiya kristallov, aktivirovannykh redkozemel'nymi ionami i ionami perekhodnykh metallov
Dates
24-28 Sep 2001
Place
Kazan' (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
35046260
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CERIUM SULFIDES; CONCENTRATION RATIO; D STATES; ELECTRONIC STRUCTURE; F STATES; GADOLINIUM SULFIDES; HYBRIDIZATION; LATTICE PARAMETERS; SAMARIUM SULFIDES; SOLID SOLUTIONS; VALENCE; YTTRIUM SULFIDES
Descriptors DEC
CERIUM COMPOUNDS; CHALCOGENIDES; DISPERSIONS; ENERGY LEVELS; GADOLINIUM COMPOUNDS; HOMOGENEOUS MIXTURES; MIXTURES; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SOLUTIONS; SULFIDES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS

Optional Information

Notes
11 refs., 3 figs.