Consequences of pressure-instigated spin crossover in RFeO3 perovskites;: a volume collapse with no symmetry modification

被引：66

作者：

Rozenberg, GK ^{[1
]}

Pasternak, MP

Xu, WM

Dubrovinsky, LS

Carlson, S

Taylor, RD

机构：

[1] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] Univ Bayreuth, Bayer Geoinst, D-8580 Bayreuth, Germany

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

EUROPHYSICS LETTERS | 2005年 / 71卷 / 02期

关键词：

D O I：

10.1209/epl/i2005-10071-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-pressure X-ray diffraction, Mossbauer, and Raman studies in the antiferromagnetic insulators RFeO3 orthorhombic perovskites (R = Pr, Eu, Lu) disclose an unusual phenomena of a reversible first-order isostructural phase transition around 50 GPa concurring with an abrupt similar to 5% volume decrease. It is shown experimentally that this transformation concurs with, and is driven by, a high-to-low-spin transition taking place in Fe3+; a manifestation of a new kind of isostructural phase transition. These studies suggest that the RFeO3 perovskite is a rather sturdy oxide-structure, maintaining its original structural symmetry beyond 125 GPa.

引用

页码：228 / 234

页数：7

共 25 条

[11] Raman spectroscopy of orthorhombic perovskitelike YMnO3 and LaMnO3 [J].

Iliev, MN ;

Abrashev, MV ;

Lee, HG ;

Popov, VN ;

Sun, YY ;

Thomsen, C ;

Meng, RL ;

Chu, CW .

PHYSICAL REVIEW B, 1998, 57 (05) :2872-2877

[12] THE NATURE OF SPIN-STATE TRANSITIONS IN SOLID COMPLEXES OF IRON(II) AND THE INTERPRETATION OF SOME ASSOCIATED PHENOMENA [J].

KONIG, E ;

RITTER, G ;

KULSHRESHTHA, SK .

CHEMICAL REVIEWS, 1985, 85 (03) :219-234

[13]

Koskenmaki D. C., 1978, HDB PHYSICS CHEM RAR, V1, P337, DOI DOI 10.1016/S0168-1273(78)01008-9

[14] Pressure effect studies on spin crossover and valence tautomeric systems [J].

Ksenofontov, V ;

Gaspar, AB ;

Gütlich, P .

SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS III, 2004, 235 :23-64

[15] High-temperature fcc phase of Pr: Negative thermal expansion and intermediate valence state [J].

Kuznetsov, AY ;

Dmitriev, VP ;

Bandilet, OI ;

Weber, HP .

PHYSICAL REVIEW B, 2003, 68 (06)

[16]

Larson A. C., 1994, 86 LAUR LOS AL NAT L

[17]

Machavariani GY, 1998, REV SCI INSTRUM, V69, P1423, DOI 10.1063/1.1148775

[18] The elastic constants of MgSiO3 perovskite at pressures and temperatures of the Earth's mantle [J].

Oganov, AR ;

Brodholt, JP ;

Price, GD .

NATURE, 2001, 411 (6840) :934-937

[19] High pressure collapse of magnetism in Fe0.94O:: Mossbauer spectroscopy beyond 100 GPa [J].

Pasternak, MP ;

Taylor, RD ;

Jeanloz, R ;

Li, X ;

Nguyen, JH ;

McCammon, CA .

PHYSICAL REVIEW LETTERS, 1997, 79 (25) :5046-5049

[20] Equations of state for wide ranges in pressure and temperature [J].

Ponkratz, U ;

Holzapfel, WB .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (14) :S963-S972

← 1 2 3 →