Magnetic properties of RMn$sub 2$ Ge$sub 2$ compounds (R = La, Ce, Pr, Nd, Cd, Tb, Dy, Ho, Er, and Th)
Journal Article
·
· J. Appl. Phys., v. 46, no. 11, pp. 4957-4960
OSTI ID:4057563
The magnetic properties were investigated from 4.2 to 500$sup 0$K. LaMn$sub 2$Ge$sub 2$, CeMn$sub 2$Ge$sub 2$, PrMn$sub 2$Ge$sub 2$, and NdMn$sub 2$Ge$sub 2$ are ferromagnetic with Curie temperatures of 306, 316, 334, and 334$sup 0$K, respectively. The heavy rare-earth compounds do not order ferromagnetically until low temperatures. GdMn$sub 2$Ge$sub 2$ shows a sharp magnetic transition at 97$sup 0$K both in the magnetization-vs-temperature and resistivity-vs-temperature data. For this compound, it is proposed that above 97$sup 0$K the Mn moments order antiferromagnetically among themselves while the Gd moments are disordered. Below 97$sup 0$K, the Mn moments couple ferromagnetically with each other but are opposed to the ordered Gd sublattice. Magnetic moment obtained at 4.2$sup 0$K can be explained for all the compounds on the basis of an antiferromagnetic coupling between Mn and rare-earth spins. (auth)
- Research Organization:
- Univ. of Pittsburgh
- NSA Number:
- NSA-33-023764
- OSTI ID:
- 4057563
- Journal Information:
- J. Appl. Phys., v. 46, no. 11, pp. 4957-4960, Journal Name: J. Appl. Phys., v. 46, no. 11, pp. 4957-4960; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*GERMANIUM ALLOYS-- MAGNETIC PROPERTIES
*MANGANESE ALLOYS-- MAGNETIC PROPERTIES
360104* --Materials--Metals & Alloys--Physical Properties
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LANTHANUM ALLOYS
LOW TEMPERATURE
MAGNETIC MOMENTS
MEDIUM TEMPERATURE
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
NEEL TEMPERATURE
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE CADMIUM ALLOYS-- CERIUM ALLOYS-- DYSPROSIUM ALLOYS-- ERBIUM ALLOYS-- HOLMIUM ALLOYS-- NEODYMIUM ALLOYS-- PRASEODYMIUM ALLOYS-- TERBIUM ALLOYS-- THORIUM ALLOYS
*MANGANESE ALLOYS-- MAGNETIC PROPERTIES
360104* --Materials--Metals & Alloys--Physical Properties
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
LANTHANUM ALLOYS
LOW TEMPERATURE
MAGNETIC MOMENTS
MEDIUM TEMPERATURE
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
NEEL TEMPERATURE
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE CADMIUM ALLOYS-- CERIUM ALLOYS-- DYSPROSIUM ALLOYS-- ERBIUM ALLOYS-- HOLMIUM ALLOYS-- NEODYMIUM ALLOYS-- PRASEODYMIUM ALLOYS-- TERBIUM ALLOYS-- THORIUM ALLOYS