Itinerant ferromagnetism in actinide 5f-electron systems: Phenomenological analysis with spin fluctuation theory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10362631" target="_blank" >RIV/00216208:11320/17:10362631 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.96.035125" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.96.035125</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.96.035125" target="_blank" >10.1103/PhysRevB.96.035125</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Itinerant ferromagnetism in actinide 5f-electron systems: Phenomenological analysis with spin fluctuation theory

Popis výsledku v původním jazyce

We have carried out an analysis of magnetic data in 69 uranium, 7 neptunium, and 4 plutonium ferromagnets with the spin fluctuation theory developed by Takahashi [Y. Takahashi, J. Phys. Soc. Jpn. 55, 3553 (1986)]. The basic and spin fluctuation parameters of the actinide ferromagnets are determined and the applicability of the spin fluctuation theory to actinide 5f system has been discussed. Itinerant ferromagnets of the 3d transition metals and their intermetallics follow a generalized Rhodes- Wohlfarth relation between p(eff)/p(s) and T-C/T-0, viz., p(eff)/p(s).(TC/T-0)(-3/2). Here, p(s), p(eff), T-C, and T-0 are the spontaneous and effective magnetic moments, the Curie temperature, and the width of spin fluctuation spectrum in energy space, respectively. The same relation is satisfied for T-C/T-0 &lt; 1.0 in the actinide ferromagnets. However, the relation is not satisfied in a few ferromagnets with T-C/T-0 similar to 1.0 that corresponds to local moment system in the spin fluctuation theory. The deviation from the theoretical relation may be due to several other effects not included in the spin fluctuation theory such as the crystalline electric field effect on the 5f electrons from ligand atoms. The value of the spontaneous magnetic moment ps increases linearly as a function of T-C/T-0 in the uranium and neptunium ferromagnets below (T-C/T-0)(kink) = 0.32 +/- 0.02, where a kink structure appears in relation between the two quantities. ps increases more weakly above (T-C/T-0)(kink). A possible interpretation with the T-C/T-0 dependence of p(s) is given.

Název v anglickém jazyce

Itinerant ferromagnetism in actinide 5f-electron systems: Phenomenological analysis with spin fluctuation theory

Popis výsledku anglicky

We have carried out an analysis of magnetic data in 69 uranium, 7 neptunium, and 4 plutonium ferromagnets with the spin fluctuation theory developed by Takahashi [Y. Takahashi, J. Phys. Soc. Jpn. 55, 3553 (1986)]. The basic and spin fluctuation parameters of the actinide ferromagnets are determined and the applicability of the spin fluctuation theory to actinide 5f system has been discussed. Itinerant ferromagnets of the 3d transition metals and their intermetallics follow a generalized Rhodes- Wohlfarth relation between p(eff)/p(s) and T-C/T-0, viz., p(eff)/p(s).(TC/T-0)(-3/2). Here, p(s), p(eff), T-C, and T-0 are the spontaneous and effective magnetic moments, the Curie temperature, and the width of spin fluctuation spectrum in energy space, respectively. The same relation is satisfied for T-C/T-0 &lt; 1.0 in the actinide ferromagnets. However, the relation is not satisfied in a few ferromagnets with T-C/T-0 similar to 1.0 that corresponds to local moment system in the spin fluctuation theory. The deviation from the theoretical relation may be due to several other effects not included in the spin fluctuation theory such as the crystalline electric field effect on the 5f electrons from ligand atoms. The value of the spontaneous magnetic moment ps increases linearly as a function of T-C/T-0 in the uranium and neptunium ferromagnets below (T-C/T-0)(kink) = 0.32 +/- 0.02, where a kink structure appears in relation between the two quantities. ps increases more weakly above (T-C/T-0)(kink). A possible interpretation with the T-C/T-0 dependence of p(s) is given.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

96

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

000405509400002

EID výsledku v databázi Scopus

2-s2.0-85026464110