Effects of size reduction on the magnetic and magnetocaloric properties of NdMn2Ge2 nanoparticles prepared by high-energy ball milling

Kaya M., REZAEIVALA M., Yuzuak E., Akturk S., Dincer I., Elerman Y.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, cilt.252, sa.1, ss.192-197, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 252 Sayı: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1002/pssb.201451127
  • Dergi Adı: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.192-197
  • Anahtar Kelimeler: AFM, ball milling, HRTEM, magnetic measurements, MFM, NEUTRON-DIFFRACTION, MN, BEHAVIOR, RMN2GE2
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

A nanostructured NdMn2Ge2 sample is prepared by a high-energy ball-milling technique. The structural and magnetic properties of ball-milled nanopowder have been studied by high-resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), magnetic force microscopy (MFM), and magnetization measurements. According to the HRTEM results, the particle size of the nanoparticles changes from 5 to 11 nm. Curie and spin-reorientation temperatures are found to be 328 and 208K from the temperature-dependent magnetization measurements, respectively. The maximum magnetic entropy change values are about -0.4 and -1.10 J kg(-1)K(-1) for Delta H = 2T around the spin-reorientation (TSR) and Curie (TC) temperatures, respectively. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim